RikoteMaster/arc_easy_mcqa · Datasets at Hugging Face

question stringlengths 17 586	choices listlengths 3 5	answer_index int64 0 4	answer_text stringlengths 5 150	source stringclasses 1 value
Which step will most likely ensure that the results of an investigation are valid?	[ "A. using a computer to graph results", "B. verifying that results match the original hypothesis", "C. comparing the results with those of other scientists", "D. eliminating any results that appear to be abnormal" ]	2	C. comparing the results with those of other scientists	ai2_arc_easy
What is formed when a sodium atom and chlorine atom react chemically?	[ "A. an element", "B. a compound", "C. an electron", "D. a neutron" ]	1	B. a compound	ai2_arc_easy
Which of these is an example of an endothermic process?	[ "A. fireworks display", "B. glowing light stick", "C. first-aid instant cold pack", "D. gasoline-burning car engine" ]	2	C. first-aid instant cold pack	ai2_arc_easy
The distance from Earth to the Sun is about 150,000,000 km. What abbreviation do scientists use to describe this distance?	[ "A. meters per second (m/s)", "B. light-year (ly)", "C. astronomical unit (AU)", "D. electromagnetic unit (EMU)" ]	2	C. astronomical unit (AU)	ai2_arc_easy
In New York State, the longest period of daylight occurs during which month?	[ "A. June", "B. March", "C. December", "D. September" ]	0	A. June	ai2_arc_easy
Which trait does a puppy inherit from its parents?	[ "A. fur color and pattern", "B. obedience to commands", "C. food brand preferences", "D. affection for a specific home" ]	0	A. fur color and pattern	ai2_arc_easy
Which material is most easily recycled at school?	[ "A. plastic wrap", "B. notebook paper", "C. ice cream sticks", "D. rubber erasers" ]	1	B. notebook paper	ai2_arc_easy
Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?	[ "A. glucose molecule", "B. carbon dioxide", "C. single carbon atoms", "D. complex organic compounds" ]	1	B. carbon dioxide	ai2_arc_easy
The sun is a star of average size and brightness. From Earth, the sun appears as a round, yellow object in the daytime sky. At night, we see other stars. They appear as tiny points of light. Why does the sun appear larger than stars that we see at night?	[ "A. Daylight brightens the sun, making it appear larger.", "B. Starlight bends as it passes planets, making the stars appear smaller.", "C. The sun is closer to Earth than other stars, making the sun appear larger.", "D. Earth's atmosphere filters out light from other stars, making them appear smaller." ]	2	C. The sun is closer to Earth than other stars, making the sun appear larger.	ai2_arc_easy
A drain cleaner consists of sodium hydroxide and aluminum. When the drain cleaner is added to water, bubbles of hydrogen are produced, and the solution becomes very hot. Which of these best describes what happens to form the bubbles when the cleaner is added to water? F	[ "A. chemical reaction", "B. Condensation", "C. A physical change", "D. Evaporation" ]	0	A. chemical reaction	ai2_arc_easy
John has diabetes. Which of the following should he be careful about eating or drinking?	[ "A. beef", "B. eggs", "C. milk", "D. fruit juice" ]	3	D. fruit juice	ai2_arc_easy
Within a substance, atoms that collide frequently and move independently of one another are most likely in a	[ "A. liquid.", "B. solid.", "C. gas.", "D. crystal." ]	2	C. gas.	ai2_arc_easy
Which object best reflects light?	[ "A. gray door", "B. white floor", "C. black sweater", "D. brown carpet" ]	1	B. white floor	ai2_arc_easy
The gravitational attraction of the Moon causes which effect on Earth?	[ "A. ocean tides", "B. time of day", "C. energy from the Sun", "D. phases of the Moon" ]	0	A. ocean tides	ai2_arc_easy
A forest was cleared for the building of a resort, but before construction began, secondary succession set in. Which of these describes why secondary succession appeared so rapidly?	[ "A. The clearing allowed mosses to grow quickly.", "B. Rock weathering occurred for lichens to grow.", "C. Exposed substrates allowed microbes to grow.", "D. The soil components remained for plants to grow." ]	3	D. The soil components remained for plants to grow.	ai2_arc_easy
Which object is made to reflect light?	[ "A. telescope", "B. window", "C. mirror", "D. eyeglasses" ]	2	C. mirror	ai2_arc_easy
A car may produce many forms of energy from the fuel it uses. Which indicates that a car does not use fuel with 100% efficiency?	[ "A. The car changes speed.", "B. The car engine gets hot.", "C. The car stops quickly.", "D. The car slides on slippery streets." ]	1	B. The car engine gets hot.	ai2_arc_easy
After nitrogen becomes part of the lithosphere, what is the next change that nitrogen will undergo?	[ "A. used as a nutrient by plants", "B. fixed by bacteria in the soil", "C. converted into oxygen", "D. absorbed into the atmosphere by lightning" ]	1	B. fixed by bacteria in the soil	ai2_arc_easy
Which of the following would be more likely to pollute a river?	[ "A. allowing beavers to build a dam", "B. spreading fertilizer near the river", "C. mowing the grass on the river bank", "D. fishing from a bridge over the river" ]	1	B. spreading fertilizer near the river	ai2_arc_easy
For two organisms to be classified as the same species, they must produce offspring that are	[ "A. fertile.", "B. adaptable.", "C. alive at birth.", "D. identical to the parents." ]	0	A. fertile.	ai2_arc_easy
Which sentence best describes the organization of the heart?	[ "A. The heart is an organ made up of different types of tissues, each of which has different types of cells.", "B. The heart is a tissue made up of different types of organs, each of which has different types of cells.", "C. The heart is a system made up of one type of tissue and identical cells.", "D. The heart is a tissue made up of one type of organ and identical cells." ]	0	A. The heart is an organ made up of different types of tissues, each of which has different types of cells.	ai2_arc_easy
Which stage in the reptile life cycle is most like the birth of a lion cub?	[ "A. hatching from an egg", "B. shedding the skin", "C. hunting for food", "D. finding a mate" ]	0	A. hatching from an egg	ai2_arc_easy
What would be the best way to determine the role of squirrels in a forest ecosystem?	[ "A. measure the length and mass of several squirrels", "B. determine the genes that control squirrel traits", "C. make field observations of squirrels in their natural habitat", "D. read articles about the energy and nutrient requirements of squirrels" ]	2	C. make field observations of squirrels in their natural habitat	ai2_arc_easy
Which of the following systems breaks food into nutrients that can be used by the body?	[ "A. circulatory", "B. digestive", "C. respiratory", "D. reproductive" ]	1	B. digestive	ai2_arc_easy
Barry collected four different rocks. The rock with the GREATEST mass will feel the ___.	[ "A. heaviest", "B. smoothest", "C. sharpest", "D. hardest" ]	0	A. heaviest	ai2_arc_easy
Which of the following is not an inherited trait of humans?	[ "A. eye color", "B. hair color", "C. favorite food", "D. height" ]	2	C. favorite food	ai2_arc_easy
When a person chews, saliva from the mouth mixes with starches in food. These starches begin to turn into sugars. Changing starches into sugars is best described as	[ "A. a phase change.", "B. a cellular change.", "C. a physical change.", "D. a chemical change." ]	3	D. a chemical change.	ai2_arc_easy
Which of these renewable resources results in an increase in pollution when used to produce energy?	[ "A. water", "B. wind", "C. biomass", "D. geothermal" ]	2	C. biomass	ai2_arc_easy
Granite is an igneous rock. Which of these describes what usually happens to granite after it is weathered, broken into small particles, buried deep underground, and compacted?	[ "A. The granite becomes a new rock type.", "B. The granite forms an active volcano.", "C. The granite becomes part of a deep fault.", "D. The granite forms a tall mountain." ]	0	A. The granite becomes a new rock type.	ai2_arc_easy
The features below are all present on Earth. Which feature could also be found on the Moon?	[ "A. crater", "B. clouds", "C. electrical storms", "D. nitrogen based atmosphere" ]	0	A. crater	ai2_arc_easy
What is the highest temperature that water can reach in a pot on a stove?	[ "A. 50°C", "B. 90°C", "C. 100°C", "D. 212°C" ]	2	C. 100°C	ai2_arc_easy
In 2004 the Hubble space telescope captured images of distant star clusters, each containing about a million stars. These star clusters were most likely part of which structure?	[ "A. a black hole", "B. a galaxy", "C. a nebula", "D. a solar system" ]	1	B. a galaxy	ai2_arc_easy
Where is most of the mass of the atom located?	[ "A. in the protons", "B. in the nucleus", "C. in the neutrons", "D. in the electrons" ]	1	B. in the nucleus	ai2_arc_easy
Which situation is the best example of ecological succession?	[ "1. An organism survives a difficult winter.", "2. The populations in an area remain the same.", "3. One species replaces another species in an ecosystem.", "4. Each of several species uses the same amount of resources." ]	2	3. One species replaces another species in an ecosystem.	ai2_arc_easy
The BEST way to tell the DIFFERENCE between an oak and a maple tree is to compare the	[ "A. height of both trees.", "B. number of leaves on the trees.", "C. size of the root systems of the trees.", "D. shape of the leaves." ]	3	D. shape of the leaves.	ai2_arc_easy
Which example describes a learned behavior in a dog?	[ "A. smelling the air for odors", "B. barking when disturbed", "C. sitting on command", "D. digging in soil" ]	2	C. sitting on command	ai2_arc_easy
In a lab investigation, a student notes that two metal blocks have the same mass. Based on this observation, if the two blocks were put on opposite sides of a balance, they would best represent	[ "A. balanced forces.", "B. unbalanced forces.", "C. equal and opposite reactions.", "D. objects in motion." ]	0	A. balanced forces.	ai2_arc_easy
A scientist was investigating why several fish caught from a local stream displayed similar mutations. He found that the water temperature of the stream was elevated since an industrial plant began discharging heated water into the stream. The scientist concluded that increased water temperature during the egg phase led to the mutation in the fish. According to this conclusion, the mutation was caused by	[ "A. an autoimmune disorder.", "B. a congenital defect.", "C. an environmental condition.", "D. an injury from a predator." ]	2	C. an environmental condition.	ai2_arc_easy
Solar radiation has a part in the water cycle by	[ "A. affecting ocean tides.", "B. helping in the absorption of groundwater.", "C. determining the type of clouds formed.", "D. changing water to a vapor." ]	3	D. changing water to a vapor.	ai2_arc_easy
A student sets a block at the top of a wooden ramp. The student pushes the block. As the block slides down the ramp, it slows down and then comes to a stop. What force causes the block to slow down?	[ "A. the force of gravity", "B. the force of friction", "C. the force of magnetism", "D. the force of the student's push" ]	1	B. the force of friction	ai2_arc_easy
Which of these explains how a trench can form?	[ "A. two oceanic plates converging", "B. two continental plates converging", "C. two continental plates diverging", "D. two oceanic plates diverging" ]	0	A. two oceanic plates converging	ai2_arc_easy
Pepsin is an enzyme that acts in the stomach for protein digestion. Which of these is most likely the main role of pepsin in this metabolic reaction?	[ "A. to speed up the rate of reaction", "B. to reduce the loss of energy as heat", "C. to control the direction of the reaction", "D. to protect the reaction from other chemicals" ]	0	A. to speed up the rate of reaction	ai2_arc_easy
Sodium chloride, commonly called "table salt," is made up of sodium and chlorine that have been combined chemically. Which term best describes sodium chloride?	[ "A. Acid", "B. Atom", "C. Element", "D. Compound" ]	3	D. Compound	ai2_arc_easy
Katia was listening to music on the radio. In order for the sound to be produced, the electrical energy must be converted into which type of energy?	[ "A. thermal energy", "B. magnetic energy", "C. chemical energy", "D. mechanical energy" ]	3	D. mechanical energy	ai2_arc_easy
Studies of snail fossils in Egypt indicate that areas of Egypt that are now desert were once thriving savannahs approximately 130,000 years ago. What does the presence of these fossils indicate about the area of Egypt that was thriving 130,000 years ago?	[ "A. There was more humidity in the air.", "B. There were fewer nutrients in the soil.", "C. There was more snowfall in the region.", "D. There was less solar radiation in the region." ]	0	A. There was more humidity in the air.	ai2_arc_easy
Which statement identifies an energy source as renewable?	[ "A. Oil, because it is found underground.", "B. Wind, because it is always available.", "C. Water, because it is becoming scarce.", "D. Coal, because it was formed from plants." ]	1	B. Wind, because it is always available.	ai2_arc_easy
A wet towel will dry when it is left in the Sun. Which process occurs to make this happen?	[ "A. melting", "B. boiling", "C. condensation", "D. evaporation" ]	3	D. evaporation	ai2_arc_easy
Otto pushed a toy car across a floor. The car traveled fast across the wood, but it slowed to a stop on the carpet. Which best explains what happened when the car reached the carpet?	[ "A. Inertia decreased.", "B. Gravity increased.", "C. Friction increased.", "D. Magnetism decreased." ]	2	C. Friction increased.	ai2_arc_easy
Eye color is a physical trait. Which statement best explains why a child has a specific eye color?	[ "A. Eye color is a learned trait.", "B. Eye color is an inherited trait.", "C. Eye color is a trait that changes over time.", "D. Eye color is a trait that happens by chance." ]	1	B. Eye color is an inherited trait.	ai2_arc_easy
Manganese has an atomic number of 25 and an atomic mass of 55 amu. How many particles are found in its nucleus?	[ "A. 25", "B. 30", "C. 55", "D. 80" ]	2	C. 55	ai2_arc_easy
Students researched monkeys at a zoo. They recorded the monkeys' traits and behaviors. This investigation activity is best described as	[ "A. controlling.", "B. hypothesizing.", "C. observing.", "D. inferring." ]	2	C. observing.	ai2_arc_easy
The fur of an arctic fox turns from brown to white as winter approaches. This is an example of	[ "A. camouflage", "B. hibernation", "C. migration", "D. movement" ]	0	A. camouflage	ai2_arc_easy
Which is an example of a chemical change?	[ "A. a rusting car fender", "B. a spinning top", "C. a spilled bucket of water", "D. a melting popsicle" ]	0	A. a rusting car fender	ai2_arc_easy
Which statement is describing climate?	[ "A. It snowed 12 centimeters last night.", "B. Last winter was colder than normal.", "C. There is a thunderstorm watch for the local area.", "D. The temperature will be between 32°C and 37°C all week." ]	1	B. Last winter was colder than normal.	ai2_arc_easy
Scientists have categorized trees based on whether they keep or lose their leaves each year. Another logical way to categorize trees is based on the	[ "A. types of nutrients needed to grow.", "B. amount of oxygen that is released into the air.", "C. color of leaves that are produced.", "D. type of fruit that is produced." ]	3	D. type of fruit that is produced.	ai2_arc_easy
Which resource is considered nonrenewable?	[ "1. wind power", "2. solar energy", "3. moving water", "4. fossil fuels" ]	3	4. fossil fuels	ai2_arc_easy
Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles?	[ "1. Use tweezers to separate them.", "2. Use a magnet to separate them.", "3. Add water to the mixture.", "4. Pour the mixture into a filter." ]	1	2. Use a magnet to separate them.	ai2_arc_easy
Which habitat on Earth would probably 28 add the greatest amount of water to the water cycle through evaporation?	[ "A. cold lake", "B. desert sand", "C. warm ocean", "D. mountain rock" ]	2	C. warm ocean	ai2_arc_easy
Which of these actions will change a sedimentary rock, such as limestone, into a metamorphic rock, such as marble?	[ "A. pressure from a glacier", "B. heat from magma", "C. erosion from flowing water", "D. radiation from the Sun" ]	1	B. heat from magma	ai2_arc_easy
A loaf of bread is baking in a pan in a 350° F oven. What would cause a burn to a hand the quickest because of its low specific heat?	[ "A. the metal pan", "B. the air in the oven", "C. the surface of the bread", "D. the outside of the oven door" ]	0	A. the metal pan	ai2_arc_easy
A student poured some sugar into a glass of water. After the water was stirred, no solid sugar remained in the glass. Which statement best describes what happened?	[ "A. The sugar reacted with water to form elements.", "B. The sugar reacted with water to form a mixture.", "C. The sugar dissolved in water to form a solution.", "D. The sugar dissolved in water to form compounds." ]	2	C. The sugar dissolved in water to form a solution.	ai2_arc_easy
The magnitude of the gravitational force between two planets depends on the	[ "A. speed the planets rotate.", "B. other nearby planets.", "C. volume of the planets.", "D. distance between the planets." ]	3	D. distance between the planets.	ai2_arc_easy
The fossils that are found in the oldest layers of sedimentary rock were formed which types of organisms?	[ "A. only organisms that lived in the sea", "B. only organisms that lived on land", "C. only organisms that lived in the air", "D. organisms that lived on the land, in the sea and in the air" ]	0	A. only organisms that lived in the sea	ai2_arc_easy
A snail's shell provides the snail with	[ "A. food.", "B. energy.", "C. protection.", "D. transportation." ]	2	C. protection.	ai2_arc_easy
Since green plants make their own food, they are called	[ "A. predators", "B. prey", "C. decomposers", "D. producers" ]	3	D. producers	ai2_arc_easy
Which metalloid is used in solar cells and computer chips?	[ "A. silicon", "B. silver", "C. arsenic", "D. antimony" ]	0	A. silicon	ai2_arc_easy
The best evidence that two land areas were once connected is the discovery that both land masses	[ "A. have the same climate.", "B. are in the same stage of succession.", "C. exist along the same line of longitude.", "D. have similar types of rocks and fossils." ]	3	D. have similar types of rocks and fossils.	ai2_arc_easy
Rachel purchased a kit for making a skateboard ramp. Which of the following is most important to have for putting the ramp together?	[ "A. a picture showing the colors of different ramp parts", "B. a diagram showing some ways to use the ramp", "C. a list of prices for other available kits", "D. a set of instructions for the kit materials" ]	3	D. a set of instructions for the kit materials	ai2_arc_easy
What is the smallest particle of the element gold (Au) that can still be classified as gold?	[ "A. atom", "B. molecule", "C. neutron", "D. proton" ]	0	A. atom	ai2_arc_easy
Which best describes the function of the small intestine?	[ "A. oxygenation of tissue", "B. excretion of toxic wastes", "C. transportation of blood cells", "D. digestion and absorption of food" ]	3	D. digestion and absorption of food	ai2_arc_easy
A forest is flooded when a natural dam breaks, leaving the forest floor under two meters of water. Which animal is most affected by the flooding?	[ "A. a crow", "B. a rabbit", "C. a squirrel", "D. a butterfly" ]	1	B. a rabbit	ai2_arc_easy
Which object will most likely be attracted to a magnet?	[ "A. wooden block", "B. plastic cup", "C. metal nail", "D. glass bead" ]	2	C. metal nail	ai2_arc_easy
At what temperature does pure water boil?	[ "A. 0°C", "B. 32°C", "C. 100°C", "D. 212°C" ]	2	C. 100°C	ai2_arc_easy
Animals that eat both plant matter and meat are referred to as	[ "A. decomposers.", "B. scavengers.", "C. herbivores.", "D. omnivores." ]	3	D. omnivores.	ai2_arc_easy
Corals are animals that live in tropical oceans. Fossils of corals are found in Ohio. What does the presence of coral fossils suggest about how the environment of Ohio has changed over time?	[ "A. Ohio was once covered by warm seas.", "B. A large glacier once passed over Ohio.", "C. The average rainfall in Ohio is now much more than it once was.", "D. The average temperature in Ohio is now much warmer than it." ]	0	A. Ohio was once covered by warm seas.	ai2_arc_easy
Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?	[ "A. Metal doesn't get hot and melt when you plug it into the outlet.", "B. Metal is strong and is less likely to break when you plug it into the outlet.", "C. Metal is an insulator and prevents shocks when you plug it into the outlet.", "D. Metal is a conductor and completes a circuit when you plug it into the outlet." ]	3	D. Metal is a conductor and completes a circuit when you plug it into the outlet.	ai2_arc_easy
Where is an igneous rock such as pumice most likely formed?	[ "A. in a desert", "B. in a creek bed", "C. near a volcano", "D. under a glacier" ]	2	C. near a volcano	ai2_arc_easy
Why are many telescopes used far from cities?	[ "A. The light from the cities makes it hard to see stars.", "B. The noise from the cities vibrates the telescopes.", "C. The power lines from the cities produce interference waves.", "D. The pollution from the cities reflects starlight." ]	0	A. The light from the cities makes it hard to see stars.	ai2_arc_easy
Where do plants get energy from to make food?	[ "A. air", "B. soil", "C. water", "D. sunlight" ]	3	D. sunlight	ai2_arc_easy
Which of the following is most likely to cause water to change from one state of matter to another state of matter?	[ "A. increased precipitation", "B. the weathering of rocks", "C. a decrease in wind speed", "D. a change in air temperature" ]	3	D. a change in air temperature	ai2_arc_easy
When a soccer player kicks a ball, which two systems work directly with the muscular system?	[ "A. immune and excretory", "B. digestive and respiratory", "C. nervous and skeletal", "D. circulatory and integumentary" ]	2	C. nervous and skeletal	ai2_arc_easy
Which two activities are carried out by all species of living things?	[ "A. make food and eliminate waste", "B. hibernate and take in nutrients", "C. grow and reproduce", "D. migrate and seek shelter" ]	2	C. grow and reproduce	ai2_arc_easy
Which best explains why a person infected with bacteria may have a fever?	[ "A. The body is responding to fight off the bacteria.", "B. The body is releasing waste material from the bacteria.", "C. The body is producing hormones to kill the infection.", "D. The body is reducing the blood supply to the infection site." ]	0	A. The body is responding to fight off the bacteria.	ai2_arc_easy
Most of the concentration of which gas results from the activity of producer organisms?	[ "A. nitrogen", "B. oxygen", "C. water vapor", "D. carbon dioxide" ]	1	B. oxygen	ai2_arc_easy
What is determined by the speed that Earth rotates on its axis?	[ "A. the length of a day", "B. the energy that reaches a location", "C. the temperature of water in the ocean", "D. the number of seasons in a year" ]	0	A. the length of a day	ai2_arc_easy
The spectrum of visible light can be seen in a rainbow because white light is	[ "A. reflected and transmitted.", "B. refracted and dispersed.", "C. absorbed and diffracted.", "D. produced and emitted." ]	1	B. refracted and dispersed.	ai2_arc_easy
Kate sees a full moon. About how much time will go by before the next full moon?	[ "A. one week", "B. two weeks", "C. one month", "D. one year" ]	2	C. one month	ai2_arc_easy
The sediments found in a riverbed are most likely a result of which action on nearby rock?	[ "A. heat", "B. faulting", "C. pressure", "D. weathering" ]	3	D. weathering	ai2_arc_easy
The most common way humans contribute to the extinction of organisms is by	[ "A. rotation of crops.", "B. use of fertilizers.", "C. destruction of habitat.", "D. introduction of competing species." ]	2	C. destruction of habitat.	ai2_arc_easy
Which of the following is an example of matter changing state?	[ "A. heating a pan of water until the water is all gone", "B. putting a soft-drink can in the refrigerator to cool it", "C. heating soup on the stove until it is hot to your tongue", "D. transferring sugar into a storage container" ]	0	A. heating a pan of water until the water is all gone	ai2_arc_easy
A car runs out of fuel while traveling on a level road and eventually comes to a stop. Which of the following best explains why the car stops?	[ "A. Some of the energy of the car was lost to friction.", "B. Some of the energy of the car was destroyed.", "C. The amount of kinetic energy increased.", "D. The amount of useful energy increased." ]	0	A. Some of the energy of the car was lost to friction.	ai2_arc_easy
Which of the following best represents one particular stage in a life cycle?	[ "A. a fish swimming", "B. a seed sprouting", "C. a leaf growing", "D. a dog eating" ]	1	B. a seed sprouting	ai2_arc_easy
Which process of the water cycle transports water from plants to clouds?	[ "A. precipitation", "B. transpiration", "C. condensation", "D. sublimation" ]	1	B. transpiration	ai2_arc_easy
Sulfur scrubbers are devices installed in coal-fired power plants. Sulfur scrubbers reduce the emission of sulfur dioxide. What environmental problem are sulfur scrubbers most likely trying to address?	[ "A. ozone", "B. erosion", "C. acid rain", "D. nutrient runoff" ]	2	C. acid rain	ai2_arc_easy
Which system of the human body provides protection to most of the major organs?	[ "A. skeletal system", "B. circulatory system", "C. respiratory system", "D. muscular system" ]	0	A. skeletal system	ai2_arc_easy
A scientist developed a model that described the actions of DNA in the cell nuclei, which helped explain how traits were inherited. Which scientist helped develop this model?	[ "A. Bohr", "B. Hooke", "C. Mendel", "D. Watson" ]	3	D. Watson	ai2_arc_easy
Which item is designed to change electrical energy into heat energy?	[ "A. Alarm clock", "B. Hand dryer", "C. Fan", "D. Telephone" ]	1	B. Hand dryer	ai2_arc_easy
Which characteristic is the best example of an inherited trait?	[ "A. eye color", "B. an infection", "C. knowledge of soccer", "D. length of hair" ]	0	A. eye color	ai2_arc_easy
Which correctly arranges three scientific terms-theory, law, and hypothesis-from least to most accepted or tested?	[ "A. theory, hypothesis, law", "B. hypothesis, law, theory", "C. theory, law, hypothesis", "D. hypothesis, theory, law" ]	3	D. hypothesis, theory, law	ai2_arc_easy
The metal lid on a glass jar is hard to open, so it is held under warm, running water. What causes the jar to open easily after it was held under the water?	[ "A. The water increased the pressure under the lid.", "B. The jar shrunk with the warm water.", "C. The water acted as a lubricant between the glass and the metal.", "D. The metal lid expanded under warm water." ]	3	D. The metal lid expanded under warm water.	ai2_arc_easy

Which step will most likely ensure that the results of an investigation are valid?

[ "A. using a computer to graph results", "B. verifying that results match the original hypothesis", "C. comparing the results with those of other scientists", "D. eliminating any results that appear to be abnormal" ]

2

C. comparing the results with those of other scientists

ai2_arc_easy

What is formed when a sodium atom and chlorine atom react chemically?

[ "A. an element", "B. a compound", "C. an electron", "D. a neutron" ]

1

B. a compound

ai2_arc_easy

Which of these is an example of an endothermic process?

[ "A. fireworks display", "B. glowing light stick", "C. first-aid instant cold pack", "D. gasoline-burning car engine" ]

2

C. first-aid instant cold pack

ai2_arc_easy

The distance from Earth to the Sun is about 150,000,000 km. What abbreviation do scientists use to describe this distance?

[ "A. meters per second (m/s)", "B. light-year (ly)", "C. astronomical unit (AU)", "D. electromagnetic unit (EMU)" ]

2

C. astronomical unit (AU)

ai2_arc_easy

In New York State, the longest period of daylight occurs during which month?

[ "A. June", "B. March", "C. December", "D. September" ]

0

A. June

ai2_arc_easy

Which trait does a puppy inherit from its parents?

[ "A. fur color and pattern", "B. obedience to commands", "C. food brand preferences", "D. affection for a specific home" ]

0

A. fur color and pattern

ai2_arc_easy

Which material is most easily recycled at school?

[ "A. plastic wrap", "B. notebook paper", "C. ice cream sticks", "D. rubber erasers" ]

1

B. notebook paper

ai2_arc_easy

Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?

[ "A. glucose molecule", "B. carbon dioxide", "C. single carbon atoms", "D. complex organic compounds" ]

1

B. carbon dioxide

ai2_arc_easy

The sun is a star of average size and brightness. From Earth, the sun appears as a round, yellow object in the daytime sky. At night, we see other stars. They appear as tiny points of light. Why does the sun appear larger than stars that we see at night?

[ "A. Daylight brightens the sun, making it appear larger.", "B. Starlight bends as it passes planets, making the stars appear smaller.", "C. The sun is closer to Earth than other stars, making the sun appear larger.", "D. Earth's atmosphere filters out light from other stars, making them appear smaller." ]

2

C. The sun is closer to Earth than other stars, making the sun appear larger.

ai2_arc_easy

A drain cleaner consists of sodium hydroxide and aluminum. When the drain cleaner is added to water, bubbles of hydrogen are produced, and the solution becomes very hot. Which of these best describes what happens to form the bubbles when the cleaner is added to water? F

[ "A. chemical reaction", "B. Condensation", "C. A physical change", "D. Evaporation" ]

0

A. chemical reaction

ai2_arc_easy

John has diabetes. Which of the following should he be careful about eating or drinking?

[ "A. beef", "B. eggs", "C. milk", "D. fruit juice" ]

3

D. fruit juice

ai2_arc_easy

Within a substance, atoms that collide frequently and move independently of one another are most likely in a

[ "A. liquid.", "B. solid.", "C. gas.", "D. crystal." ]

2

C. gas.

ai2_arc_easy

Which object best reflects light?

[ "A. gray door", "B. white floor", "C. black sweater", "D. brown carpet" ]

1

B. white floor

ai2_arc_easy

The gravitational attraction of the Moon causes which effect on Earth?

[ "A. ocean tides", "B. time of day", "C. energy from the Sun", "D. phases of the Moon" ]

0

A. ocean tides

ai2_arc_easy

A forest was cleared for the building of a resort, but before construction began, secondary succession set in. Which of these describes why secondary succession appeared so rapidly?

[ "A. The clearing allowed mosses to grow quickly.", "B. Rock weathering occurred for lichens to grow.", "C. Exposed substrates allowed microbes to grow.", "D. The soil components remained for plants to grow." ]

3

D. The soil components remained for plants to grow.

ai2_arc_easy

Which object is made to reflect light?

[ "A. telescope", "B. window", "C. mirror", "D. eyeglasses" ]

2

C. mirror

ai2_arc_easy

A car may produce many forms of energy from the fuel it uses. Which indicates that a car does not use fuel with 100% efficiency?

[ "A. The car changes speed.", "B. The car engine gets hot.", "C. The car stops quickly.", "D. The car slides on slippery streets." ]

1

B. The car engine gets hot.

ai2_arc_easy

After nitrogen becomes part of the lithosphere, what is the next change that nitrogen will undergo?

[ "A. used as a nutrient by plants", "B. fixed by bacteria in the soil", "C. converted into oxygen", "D. absorbed into the atmosphere by lightning" ]

1

B. fixed by bacteria in the soil

ai2_arc_easy

Which of the following would be more likely to pollute a river?

[ "A. allowing beavers to build a dam", "B. spreading fertilizer near the river", "C. mowing the grass on the river bank", "D. fishing from a bridge over the river" ]

1

B. spreading fertilizer near the river

ai2_arc_easy

For two organisms to be classified as the same species, they must produce offspring that are

[ "A. fertile.", "B. adaptable.", "C. alive at birth.", "D. identical to the parents." ]

0

A. fertile.

ai2_arc_easy

Which sentence best describes the organization of the heart?

[ "A. The heart is an organ made up of different types of tissues, each of which has different types of cells.", "B. The heart is a tissue made up of different types of organs, each of which has different types of cells.", "C. The heart is a system made up of one type of tissue and identical cells.", "D. The heart is a tissue made up of one type of organ and identical cells." ]

0

A. The heart is an organ made up of different types of tissues, each of which has different types of cells.

ai2_arc_easy

Which stage in the reptile life cycle is most like the birth of a lion cub?

[ "A. hatching from an egg", "B. shedding the skin", "C. hunting for food", "D. finding a mate" ]

0

A. hatching from an egg

ai2_arc_easy

What would be the best way to determine the role of squirrels in a forest ecosystem?

[ "A. measure the length and mass of several squirrels", "B. determine the genes that control squirrel traits", "C. make field observations of squirrels in their natural habitat", "D. read articles about the energy and nutrient requirements of squirrels" ]

2

C. make field observations of squirrels in their natural habitat

ai2_arc_easy

Which of the following systems breaks food into nutrients that can be used by the body?

[ "A. circulatory", "B. digestive", "C. respiratory", "D. reproductive" ]

1

B. digestive

ai2_arc_easy

Barry collected four different rocks. The rock with the GREATEST mass will feel the ___.

[ "A. heaviest", "B. smoothest", "C. sharpest", "D. hardest" ]

0

A. heaviest

ai2_arc_easy

Which of the following is not an inherited trait of humans?

[ "A. eye color", "B. hair color", "C. favorite food", "D. height" ]

2

C. favorite food

ai2_arc_easy

When a person chews, saliva from the mouth mixes with starches in food. These starches begin to turn into sugars. Changing starches into sugars is best described as

[ "A. a phase change.", "B. a cellular change.", "C. a physical change.", "D. a chemical change." ]

3

D. a chemical change.

ai2_arc_easy

Which of these renewable resources results in an increase in pollution when used to produce energy?

[ "A. water", "B. wind", "C. biomass", "D. geothermal" ]

2

C. biomass

ai2_arc_easy

Granite is an igneous rock. Which of these describes what usually happens to granite after it is weathered, broken into small particles, buried deep underground, and compacted?

[ "A. The granite becomes a new rock type.", "B. The granite forms an active volcano.", "C. The granite becomes part of a deep fault.", "D. The granite forms a tall mountain." ]

0

A. The granite becomes a new rock type.

ai2_arc_easy

The features below are all present on Earth. Which feature could also be found on the Moon?

[ "A. crater", "B. clouds", "C. electrical storms", "D. nitrogen based atmosphere" ]

0

A. crater

ai2_arc_easy

What is the highest temperature that water can reach in a pot on a stove?

[ "A. 50°C", "B. 90°C", "C. 100°C", "D. 212°C" ]

2

C. 100°C

ai2_arc_easy

In 2004 the Hubble space telescope captured images of distant star clusters, each containing about a million stars. These star clusters were most likely part of which structure?

[ "A. a black hole", "B. a galaxy", "C. a nebula", "D. a solar system" ]

1

B. a galaxy

ai2_arc_easy

Where is most of the mass of the atom located?

[ "A. in the protons", "B. in the nucleus", "C. in the neutrons", "D. in the electrons" ]

1

B. in the nucleus

ai2_arc_easy

Which situation is the best example of ecological succession?

[ "1. An organism survives a difficult winter.", "2. The populations in an area remain the same.", "3. One species replaces another species in an ecosystem.", "4. Each of several species uses the same amount of resources." ]

2

3. One species replaces another species in an ecosystem.

ai2_arc_easy

The BEST way to tell the DIFFERENCE between an oak and a maple tree is to compare the

[ "A. height of both trees.", "B. number of leaves on the trees.", "C. size of the root systems of the trees.", "D. shape of the leaves." ]

3

D. shape of the leaves.

ai2_arc_easy

Which example describes a learned behavior in a dog?

[ "A. smelling the air for odors", "B. barking when disturbed", "C. sitting on command", "D. digging in soil" ]

2

C. sitting on command

ai2_arc_easy

In a lab investigation, a student notes that two metal blocks have the same mass. Based on this observation, if the two blocks were put on opposite sides of a balance, they would best represent

[ "A. balanced forces.", "B. unbalanced forces.", "C. equal and opposite reactions.", "D. objects in motion." ]

0

A. balanced forces.

ai2_arc_easy

A scientist was investigating why several fish caught from a local stream displayed similar mutations. He found that the water temperature of the stream was elevated since an industrial plant began discharging heated water into the stream. The scientist concluded that increased water temperature during the egg phase led to the mutation in the fish. According to this conclusion, the mutation was caused by

[ "A. an autoimmune disorder.", "B. a congenital defect.", "C. an environmental condition.", "D. an injury from a predator." ]

2

C. an environmental condition.

ai2_arc_easy

Solar radiation has a part in the water cycle by

[ "A. affecting ocean tides.", "B. helping in the absorption of groundwater.", "C. determining the type of clouds formed.", "D. changing water to a vapor." ]

3

D. changing water to a vapor.

ai2_arc_easy

A student sets a block at the top of a wooden ramp. The student pushes the block. As the block slides down the ramp, it slows down and then comes to a stop. What force causes the block to slow down?

[ "A. the force of gravity", "B. the force of friction", "C. the force of magnetism", "D. the force of the student's push" ]

1

B. the force of friction

ai2_arc_easy

Which of these explains how a trench can form?

[ "A. two oceanic plates converging", "B. two continental plates converging", "C. two continental plates diverging", "D. two oceanic plates diverging" ]

0

A. two oceanic plates converging

ai2_arc_easy

Pepsin is an enzyme that acts in the stomach for protein digestion. Which of these is most likely the main role of pepsin in this metabolic reaction?

[ "A. to speed up the rate of reaction", "B. to reduce the loss of energy as heat", "C. to control the direction of the reaction", "D. to protect the reaction from other chemicals" ]

0

A. to speed up the rate of reaction

ai2_arc_easy

Sodium chloride, commonly called "table salt," is made up of sodium and chlorine that have been combined chemically. Which term best describes sodium chloride?

[ "A. Acid", "B. Atom", "C. Element", "D. Compound" ]

3

D. Compound

ai2_arc_easy

Katia was listening to music on the radio. In order for the sound to be produced, the electrical energy must be converted into which type of energy?

[ "A. thermal energy", "B. magnetic energy", "C. chemical energy", "D. mechanical energy" ]

3

D. mechanical energy

ai2_arc_easy

Studies of snail fossils in Egypt indicate that areas of Egypt that are now desert were once thriving savannahs approximately 130,000 years ago. What does the presence of these fossils indicate about the area of Egypt that was thriving 130,000 years ago?

[ "A. There was more humidity in the air.", "B. There were fewer nutrients in the soil.", "C. There was more snowfall in the region.", "D. There was less solar radiation in the region." ]

0

A. There was more humidity in the air.

ai2_arc_easy

Which statement identifies an energy source as renewable?

[ "A. Oil, because it is found underground.", "B. Wind, because it is always available.", "C. Water, because it is becoming scarce.", "D. Coal, because it was formed from plants." ]

1

B. Wind, because it is always available.

ai2_arc_easy

A wet towel will dry when it is left in the Sun. Which process occurs to make this happen?

[ "A. melting", "B. boiling", "C. condensation", "D. evaporation" ]

3

D. evaporation

ai2_arc_easy

Otto pushed a toy car across a floor. The car traveled fast across the wood, but it slowed to a stop on the carpet. Which best explains what happened when the car reached the carpet?

[ "A. Inertia decreased.", "B. Gravity increased.", "C. Friction increased.", "D. Magnetism decreased." ]

2

C. Friction increased.

ai2_arc_easy

Eye color is a physical trait. Which statement best explains why a child has a specific eye color?

[ "A. Eye color is a learned trait.", "B. Eye color is an inherited trait.", "C. Eye color is a trait that changes over time.", "D. Eye color is a trait that happens by chance." ]

1

B. Eye color is an inherited trait.

ai2_arc_easy

Manganese has an atomic number of 25 and an atomic mass of 55 amu. How many particles are found in its nucleus?

[ "A. 25", "B. 30", "C. 55", "D. 80" ]

2

C. 55

ai2_arc_easy

Students researched monkeys at a zoo. They recorded the monkeys' traits and behaviors. This investigation activity is best described as

[ "A. controlling.", "B. hypothesizing.", "C. observing.", "D. inferring." ]

2

C. observing.

ai2_arc_easy

The fur of an arctic fox turns from brown to white as winter approaches. This is an example of

[ "A. camouflage", "B. hibernation", "C. migration", "D. movement" ]

0

A. camouflage

ai2_arc_easy

Which is an example of a chemical change?

[ "A. a rusting car fender", "B. a spinning top", "C. a spilled bucket of water", "D. a melting popsicle" ]

0

A. a rusting car fender

ai2_arc_easy

Which statement is describing climate?

[ "A. It snowed 12 centimeters last night.", "B. Last winter was colder than normal.", "C. There is a thunderstorm watch for the local area.", "D. The temperature will be between 32°C and 37°C all week." ]

1

B. Last winter was colder than normal.

ai2_arc_easy

Scientists have categorized trees based on whether they keep or lose their leaves each year. Another logical way to categorize trees is based on the

[ "A. types of nutrients needed to grow.", "B. amount of oxygen that is released into the air.", "C. color of leaves that are produced.", "D. type of fruit that is produced." ]

3

D. type of fruit that is produced.

ai2_arc_easy

Which resource is considered nonrenewable?

[ "1. wind power", "2. solar energy", "3. moving water", "4. fossil fuels" ]

3

4. fossil fuels

ai2_arc_easy

Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles?

[ "1. Use tweezers to separate them.", "2. Use a magnet to separate them.", "3. Add water to the mixture.", "4. Pour the mixture into a filter." ]

1

2. Use a magnet to separate them.

ai2_arc_easy

Which habitat on Earth would probably 28 add the greatest amount of water to the water cycle through evaporation?

[ "A. cold lake", "B. desert sand", "C. warm ocean", "D. mountain rock" ]

2

C. warm ocean

ai2_arc_easy

Which of these actions will change a sedimentary rock, such as limestone, into a metamorphic rock, such as marble?

[ "A. pressure from a glacier", "B. heat from magma", "C. erosion from flowing water", "D. radiation from the Sun" ]

1

B. heat from magma

ai2_arc_easy

A loaf of bread is baking in a pan in a 350° F oven. What would cause a burn to a hand the quickest because of its low specific heat?

[ "A. the metal pan", "B. the air in the oven", "C. the surface of the bread", "D. the outside of the oven door" ]

0

A. the metal pan

ai2_arc_easy

A student poured some sugar into a glass of water. After the water was stirred, no solid sugar remained in the glass. Which statement best describes what happened?

[ "A. The sugar reacted with water to form elements.", "B. The sugar reacted with water to form a mixture.", "C. The sugar dissolved in water to form a solution.", "D. The sugar dissolved in water to form compounds." ]

2

C. The sugar dissolved in water to form a solution.

ai2_arc_easy

The magnitude of the gravitational force between two planets depends on the

[ "A. speed the planets rotate.", "B. other nearby planets.", "C. volume of the planets.", "D. distance between the planets." ]

3

D. distance between the planets.

ai2_arc_easy

The fossils that are found in the oldest layers of sedimentary rock were formed which types of organisms?

[ "A. only organisms that lived in the sea", "B. only organisms that lived on land", "C. only organisms that lived in the air", "D. organisms that lived on the land, in the sea and in the air" ]

0

A. only organisms that lived in the sea

ai2_arc_easy

A snail's shell provides the snail with

[ "A. food.", "B. energy.", "C. protection.", "D. transportation." ]

2

C. protection.

ai2_arc_easy

Since green plants make their own food, they are called

[ "A. predators", "B. prey", "C. decomposers", "D. producers" ]

3

D. producers

ai2_arc_easy

Which metalloid is used in solar cells and computer chips?

[ "A. silicon", "B. silver", "C. arsenic", "D. antimony" ]

0

A. silicon

ai2_arc_easy

The best evidence that two land areas were once connected is the discovery that both land masses

[ "A. have the same climate.", "B. are in the same stage of succession.", "C. exist along the same line of longitude.", "D. have similar types of rocks and fossils." ]

3

D. have similar types of rocks and fossils.

ai2_arc_easy

Rachel purchased a kit for making a skateboard ramp. Which of the following is most important to have for putting the ramp together?

[ "A. a picture showing the colors of different ramp parts", "B. a diagram showing some ways to use the ramp", "C. a list of prices for other available kits", "D. a set of instructions for the kit materials" ]

3

D. a set of instructions for the kit materials

ai2_arc_easy

What is the smallest particle of the element gold (Au) that can still be classified as gold?

[ "A. atom", "B. molecule", "C. neutron", "D. proton" ]

0

A. atom

ai2_arc_easy

Which best describes the function of the small intestine?

[ "A. oxygenation of tissue", "B. excretion of toxic wastes", "C. transportation of blood cells", "D. digestion and absorption of food" ]

3

D. digestion and absorption of food

ai2_arc_easy

A forest is flooded when a natural dam breaks, leaving the forest floor under two meters of water. Which animal is most affected by the flooding?

[ "A. a crow", "B. a rabbit", "C. a squirrel", "D. a butterfly" ]

1

B. a rabbit

ai2_arc_easy

Which object will most likely be attracted to a magnet?

[ "A. wooden block", "B. plastic cup", "C. metal nail", "D. glass bead" ]

2

C. metal nail

ai2_arc_easy

At what temperature does pure water boil?

[ "A. 0°C", "B. 32°C", "C. 100°C", "D. 212°C" ]

2

C. 100°C

ai2_arc_easy

Animals that eat both plant matter and meat are referred to as

[ "A. decomposers.", "B. scavengers.", "C. herbivores.", "D. omnivores." ]

3

D. omnivores.

ai2_arc_easy

Corals are animals that live in tropical oceans. Fossils of corals are found in Ohio. What does the presence of coral fossils suggest about how the environment of Ohio has changed over time?

[ "A. Ohio was once covered by warm seas.", "B. A large glacier once passed over Ohio.", "C. The average rainfall in Ohio is now much more than it once was.", "D. The average temperature in Ohio is now much warmer than it." ]

0

A. Ohio was once covered by warm seas.

ai2_arc_easy

Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?

[ "A. Metal doesn't get hot and melt when you plug it into the outlet.", "B. Metal is strong and is less likely to break when you plug it into the outlet.", "C. Metal is an insulator and prevents shocks when you plug it into the outlet.", "D. Metal is a conductor and completes a circuit when you plug it into the outlet." ]

3

D. Metal is a conductor and completes a circuit when you plug it into the outlet.

ai2_arc_easy

Where is an igneous rock such as pumice most likely formed?

[ "A. in a desert", "B. in a creek bed", "C. near a volcano", "D. under a glacier" ]

2

C. near a volcano

ai2_arc_easy

Why are many telescopes used far from cities?

[ "A. The light from the cities makes it hard to see stars.", "B. The noise from the cities vibrates the telescopes.", "C. The power lines from the cities produce interference waves.", "D. The pollution from the cities reflects starlight." ]

0

A. The light from the cities makes it hard to see stars.

ai2_arc_easy

Where do plants get energy from to make food?

[ "A. air", "B. soil", "C. water", "D. sunlight" ]

3

D. sunlight

ai2_arc_easy

Which of the following is most likely to cause water to change from one state of matter to another state of matter?

[ "A. increased precipitation", "B. the weathering of rocks", "C. a decrease in wind speed", "D. a change in air temperature" ]

3

D. a change in air temperature

ai2_arc_easy

When a soccer player kicks a ball, which two systems work directly with the muscular system?

[ "A. immune and excretory", "B. digestive and respiratory", "C. nervous and skeletal", "D. circulatory and integumentary" ]

2

C. nervous and skeletal

ai2_arc_easy

Which two activities are carried out by all species of living things?

[ "A. make food and eliminate waste", "B. hibernate and take in nutrients", "C. grow and reproduce", "D. migrate and seek shelter" ]

2

C. grow and reproduce

ai2_arc_easy

Which best explains why a person infected with bacteria may have a fever?

[ "A. The body is responding to fight off the bacteria.", "B. The body is releasing waste material from the bacteria.", "C. The body is producing hormones to kill the infection.", "D. The body is reducing the blood supply to the infection site." ]

0

A. The body is responding to fight off the bacteria.

ai2_arc_easy

Most of the concentration of which gas results from the activity of producer organisms?

[ "A. nitrogen", "B. oxygen", "C. water vapor", "D. carbon dioxide" ]

1

B. oxygen

ai2_arc_easy

What is determined by the speed that Earth rotates on its axis?

[ "A. the length of a day", "B. the energy that reaches a location", "C. the temperature of water in the ocean", "D. the number of seasons in a year" ]

0

A. the length of a day

ai2_arc_easy

The spectrum of visible light can be seen in a rainbow because white light is

[ "A. reflected and transmitted.", "B. refracted and dispersed.", "C. absorbed and diffracted.", "D. produced and emitted." ]

1

B. refracted and dispersed.

ai2_arc_easy

Kate sees a full moon. About how much time will go by before the next full moon?

[ "A. one week", "B. two weeks", "C. one month", "D. one year" ]

2

C. one month

ai2_arc_easy

The sediments found in a riverbed are most likely a result of which action on nearby rock?

[ "A. heat", "B. faulting", "C. pressure", "D. weathering" ]

3

D. weathering

ai2_arc_easy

The most common way humans contribute to the extinction of organisms is by

[ "A. rotation of crops.", "B. use of fertilizers.", "C. destruction of habitat.", "D. introduction of competing species." ]

2

C. destruction of habitat.

ai2_arc_easy

Which of the following is an example of matter changing state?

[ "A. heating a pan of water until the water is all gone", "B. putting a soft-drink can in the refrigerator to cool it", "C. heating soup on the stove until it is hot to your tongue", "D. transferring sugar into a storage container" ]

0

A. heating a pan of water until the water is all gone

ai2_arc_easy

A car runs out of fuel while traveling on a level road and eventually comes to a stop. Which of the following best explains why the car stops?

[ "A. Some of the energy of the car was lost to friction.", "B. Some of the energy of the car was destroyed.", "C. The amount of kinetic energy increased.", "D. The amount of useful energy increased." ]

0

A. Some of the energy of the car was lost to friction.

ai2_arc_easy

Which of the following best represents one particular stage in a life cycle?

[ "A. a fish swimming", "B. a seed sprouting", "C. a leaf growing", "D. a dog eating" ]

1

B. a seed sprouting

ai2_arc_easy

Which process of the water cycle transports water from plants to clouds?

[ "A. precipitation", "B. transpiration", "C. condensation", "D. sublimation" ]

1

B. transpiration

ai2_arc_easy

Sulfur scrubbers are devices installed in coal-fired power plants. Sulfur scrubbers reduce the emission of sulfur dioxide. What environmental problem are sulfur scrubbers most likely trying to address?

[ "A. ozone", "B. erosion", "C. acid rain", "D. nutrient runoff" ]

2

C. acid rain

ai2_arc_easy

Which system of the human body provides protection to most of the major organs?

[ "A. skeletal system", "B. circulatory system", "C. respiratory system", "D. muscular system" ]

0

A. skeletal system

ai2_arc_easy

A scientist developed a model that described the actions of DNA in the cell nuclei, which helped explain how traits were inherited. Which scientist helped develop this model?

[ "A. Bohr", "B. Hooke", "C. Mendel", "D. Watson" ]

3

D. Watson

ai2_arc_easy

Which item is designed to change electrical energy into heat energy?

[ "A. Alarm clock", "B. Hand dryer", "C. Fan", "D. Telephone" ]

1

B. Hand dryer

ai2_arc_easy

Which characteristic is the best example of an inherited trait?

[ "A. eye color", "B. an infection", "C. knowledge of soccer", "D. length of hair" ]

0

A. eye color

ai2_arc_easy

Which correctly arranges three scientific terms-theory, law, and hypothesis-from least to most accepted or tested?

[ "A. theory, hypothesis, law", "B. hypothesis, law, theory", "C. theory, law, hypothesis", "D. hypothesis, theory, law" ]

3

D. hypothesis, theory, law

ai2_arc_easy

The metal lid on a glass jar is hard to open, so it is held under warm, running water. What causes the jar to open easily after it was held under the water?

[ "A. The water increased the pressure under the lid.", "B. The jar shrunk with the warm water.", "C. The water acted as a lubricant between the glass and the metal.", "D. The metal lid expanded under warm water." ]

3

D. The metal lid expanded under warm water.

ai2_arc_easy