question stringlengths 17 586 | choices listlengths 4 4 | answer stringclasses 4 values | split stringclasses 1 value | rationale null | source_dataset stringclasses 1 value |
|---|---|---|---|---|---|
Hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to produce a saltwater solution. What are the products of this chemical reaction? | [
"NaCl and H_{2}O",
"NaOH and HCl",
"HCl and NaCl",
"NaOH and H_{2}O"
] | A | train | null | ai2_arc_ARC-Easy |
Which human activity most often has a harmful effect on the environment? | [
"breathing",
"growing",
"planting",
"polluting"
] | D | train | null | ai2_arc_ARC-Easy |
Young frogs do not resemble adult frogs. Which term is given to this pattern of development in frogs? | [
"asexual reproduction",
"cloning",
"metamorphosis",
"biological adaptation"
] | C | train | null | ai2_arc_ARC-Easy |
Bones support the body. What pulls and pushes on bones to move them? | [
"blood",
"nerves",
"muscles",
"skin"
] | C | train | null | ai2_arc_ARC-Easy |
Which statement best describes why a calcium-fortified juice would advertise that it is good for growing children? | [
"Calcium helps the growth of bones.",
"Calcium provides energy for growth.",
"Children need to drink a lot of fluids.",
"Children need calcium to prevent allergies."
] | A | train | null | ai2_arc_ARC-Easy |
Which of these tectonic plate boundaries is most likely to form a volcano? | [
"a continental plate colliding with a continental plate",
"an oceanic plate sliding past a continental plate",
"a continental plate sliding past a continental plate",
"an oceanic plate colliding into a continental plate"
] | D | train | null | ai2_arc_ARC-Easy |
Which of the following is an example of heat transfer by conduction? | [
"a whole metal spoon getting hot when one end is in hot soup",
"the inside of a car in the sun getting very hot",
"a tar road getting hotter in the sun than a concrete sidewalk",
"a fireplace fire heating a room on a cold day"
] | A | train | null | ai2_arc_ARC-Easy |
Alicia gives her brother a push while he is seated on a swing. She finds that after a few seconds, she needs to push again to keep him going. The reason her brother slows down is because the mechanical energy is converted into | [
"potential energy that heats the air.",
"chemical energy that moves the swing.",
"kinetic energy which makes the swing slow down.",
"thermal energy that is released into the atmosphere."
] | D | train | null | ai2_arc_ARC-Easy |
An example of a learned behavior is a | [
"spider building a web.",
"dog laying down on command.",
"beaver building a dam in a creek.",
"kangaroo jumping away from a predator."
] | B | train | null | ai2_arc_ARC-Easy |
An atom consists of a nucleus surrounded by | [
"ions.",
"protons.",
"neutrons.",
"electrons."
] | D | train | null | ai2_arc_ARC-Easy |
Which of these causes the atmosphere to change? | [
"increased inorganic matter in soil",
"increased use of fertilizers on crops",
"increased buildup of greenhouse gases",
"increased rainfall rates near power plants"
] | C | train | null | ai2_arc_ARC-Easy |
Which element is most likely to form an ion with a negative 2 charge? | [
"oxygen",
"nitrogen",
"beryllium",
"magnesium"
] | A | train | null | ai2_arc_ARC-Easy |
Mount St. Helens was a cone-shaped mountain that formed when molten material reached the surface of Earth and formed layers. Cone-shaped mountains form as a result of which one of these events? | [
"hurricanes",
"earthquakes",
"volcanic eruptions",
"sediment depositions"
] | C | train | null | ai2_arc_ARC-Easy |
Which process in the water cycle would be accelerated by an increase in temperature? | [
"runoff",
"evaporation",
"precipitation",
"condensation"
] | B | train | null | ai2_arc_ARC-Easy |
Which of the following foods is highest in polysaccharides? | [
"broccoli",
"potatoes",
"cheese",
"fish"
] | B | train | null | ai2_arc_ARC-Easy |
Colored alcohol is used in some glass thermometers. When placed in air of different temperatures, the column of alcohol rises or falls in the glass thermometer. Which of the following best explains why the height of the alcohol column changes? | [
"The glass contracts when heated.",
"The alcohol contracts when heated.",
"The glass expands more than the alcohol when heated.",
"The alcohol expands more than the glass when heated."
] | D | train | null | ai2_arc_ARC-Easy |
An organism, such as a nematode worm, may have only 1000 cells. It should be classified as being | [
"a virus.",
"a bacteria.",
"unicellular.",
"multicellular."
] | D | train | null | ai2_arc_ARC-Easy |
The Heliocentric Theory, as supported by Copernicus, revolutionized scientific theories regarding | [
"the life cycle.",
"the water cycle.",
"the solar system.",
"the immune system."
] | C | train | null | ai2_arc_ARC-Easy |
Which process causes the leaves of a plant to become larger? | [
"repair",
"growth",
"decomposition",
"germination"
] | B | train | null | ai2_arc_ARC-Easy |
Wind changes the surface of Earth. Which of these land formations is a result of transportation and deposition by wind? | [
"a delta",
"a glacier",
"a sand dune",
"a mountain peak"
] | C | train | null | ai2_arc_ARC-Easy |
Water moves by capillary action through soil from moist areas to dry areas. Which property of water is most responsible for this capillary action? | [
"Water is a polar molecule.",
"Water contains an oxygen atom.",
"Water has a high surface tension.",
"Water has a high specific heat."
] | C | train | null | ai2_arc_ARC-Easy |
Which action is the best method to separate a mixture of salt and water? | [
"using a magnet to extract the salt",
"adding a colored dye to the mixture",
"pouring the mixture through a filter",
"boiling the mixture until the water evaporates"
] | D | train | null | ai2_arc_ARC-Easy |
In humans, a trait can be determined by one pair or many pairs of | [
"genes",
"microbes",
"cells",
"organs"
] | A | train | null | ai2_arc_ARC-Easy |
Which animal develops inside its mother before it is born alive? | [
"Butterfly",
"Cat",
"Duck",
"Frog"
] | B | train | null | ai2_arc_ARC-Easy |
Which sequence correctly shows the levels of organization for structure and function in a human? | [
"cell -> tissue -> organ -> organ system",
"organ system -> cell -> tissue -> organ",
"tissue -> organ -> organ system -> cell",
"cell -> organ -> tissue -> organ system"
] | A | train | null | ai2_arc_ARC-Easy |
Which adaptation allows a fish to get oxygen underwater? | [
"fins",
"lungs",
"gills",
"heart"
] | C | train | null | ai2_arc_ARC-Easy |
The number of daylight hours in New York State changes with the | [
"season of the year",
"Moon's changing appearance",
"direction of the wind",
"arrival of a severe storm"
] | A | train | null | ai2_arc_ARC-Easy |
Which instrument would be used when studying a unit on amphibian anatomy? | [
"a beaker",
"a telescope",
"a dissecting kit",
"a graduated cylinder"
] | C | train | null | ai2_arc_ARC-Easy |
Which is a reason for Arkansas having multiple seasons? | [
"the tilt of Earth's axis",
"the speed of Earth's orbit",
"Earth's distance from the Sun",
"Earth gravitational pull toward the Moon"
] | A | train | null | ai2_arc_ARC-Easy |
Jessica watches the Sun set in the evening sky. What causes the setting of the Sun? | [
"The distance between Earth and the Sun is increasing.",
"The tilt of Earth on its axis is constantly changing.",
"Earth is revolving around the Sun.",
"Earth is rotating on its axis."
] | D | train | null | ai2_arc_ARC-Easy |
To which planet do National Aeronautics and Space Administration (NASA) scientists hope to send humans next? | [
"Mars",
"Venus",
"Jupiter",
"Mercury"
] | A | train | null | ai2_arc_ARC-Easy |
Which force keeps the planets in their orbits around the Sun? | [
"gravity",
"magnetism",
"electricity",
"friction"
] | A | train | null | ai2_arc_ARC-Easy |
The endangered Florida manatee is a large, aquatic mammal that feeds on sea grasses in brackish water. Due to where they like to feed, manatees are vulnerable to injuries from boat propellers. If speed zones requiring boats to maintain a low speed are placed in areas where manatees are known to congregate, which will most likely occur? | [
"less water pollution in manatee habitats will occur",
"manatees will seek alternate food sources",
"new manatee predators will surface",
"manatee populations will increase"
] | D | train | null | ai2_arc_ARC-Easy |
Which is an example of a different substance being formed? | [
"glass breaking",
"metal melting",
"water freezing",
"wood burning"
] | D | train | null | ai2_arc_ARC-Easy |
Scientists can identify an element by looking at the structure of a single | [
"atom.",
"neutron.",
"molecule.",
"electron."
] | A | train | null | ai2_arc_ARC-Easy |
Newly made proteins are modified in which organelle? | [
"ribosome",
"endoplasmic reticulum",
"mitochondrion",
"nuclear envelop"
] | B | train | null | ai2_arc_ARC-Easy |
Which of the following is the primary advantage of sexual reproduction when compared to asexual reproduction? | [
"There is a greater number of offspring.",
"There is more food available to offspring.",
"There is greater genetic variety in offspring.",
"There is a longer development time for offspring."
] | C | train | null | ai2_arc_ARC-Easy |
By attaching to sharks, remora fish eat the scraps of food left behind when the sharks feed. If remoras were not able to attach to sharks, they would most likely | [
"attach to boats.",
"not be able to survive.",
"find another source of food.",
"not need to eat anymore."
] | B | train | null | ai2_arc_ARC-Easy |
Plants need a source of energy in order to perform photosynthesis. From which source do plants receive the energy needed to perform photosynthesis? | [
"oxygen",
"sugar",
"sunlight",
"water"
] | C | train | null | ai2_arc_ARC-Easy |
What form of energy is stored in a battery? | [
"chemical",
"sound",
"light",
"heat"
] | A | train | null | ai2_arc_ARC-Easy |
When a light bulb is turned on, energy changes from one form to another. Which of the following best describes this change? | [
"sound energy to light energy",
"nuclear energy to light energy",
"electrical energy to light energy",
"magnetic energy to light energy"
] | C | train | null | ai2_arc_ARC-Easy |
Which stimulus causes a porcupine to extend its quills? | [
"lunar effect on Earth",
"seasonal temperature changes",
"threatening behavior by predators",
"environmental encroachment by humans"
] | C | train | null | ai2_arc_ARC-Easy |
When a balloon is filled with air and suddenly released, it will fly around the room as the air escapes. If compared to space transportation, the escaping air is most similar to what subsystem of a spacecraft? | [
"guidance",
"propulsion",
"support",
"suspension"
] | B | train | null | ai2_arc_ARC-Easy |
The Sun appears larger than other stars because of its | [
"yellow color",
"high temperature",
"distance from Earth",
"chemical composition"
] | C | train | null | ai2_arc_ARC-Easy |
How hot is it on the surface of the Sun? | [
"Not quite as hot as boiling water",
"About as hot as fire",
"About 100°F",
"Much hotter than almost anything on Earth"
] | D | train | null | ai2_arc_ARC-Easy |
Which two observations are both used to describe weather? | [
"precipitation and runoff",
"temperature and sky conditions",
"wind speed and erosion",
"types of clouds and deposition"
] | B | train | null | ai2_arc_ARC-Easy |
A scientist combines oxygen and hydrogen to form water. This combination illustrates that water is | [
"an atom.",
"an element.",
"a mixture.",
"a compound."
] | D | train | null | ai2_arc_ARC-Easy |
In a large forest with many animals, there are only a small number of bears. Which of these most likely limits the population of bears in the forest? | [
"supply of food",
"type of tree",
"predation by carnivores",
"amount of suitable shelter"
] | A | train | null | ai2_arc_ARC-Easy |
There is a thunderstorm close to your house. The windows rattle at the same time that you hear the thunder. What causes the windows to rattle? | [
"Sound waves from the thunder",
"Light from the lightning",
"Rain from the clouds",
"The high humidity during the storm"
] | A | train | null | ai2_arc_ARC-Easy |
Rocks in warm and humid environments can be weathered faster than rocks in other environments. Which is most likely the next step in the rock cycle for weathered rocks? | [
"They are cemented.",
"They are compacted.",
"They become eroded.",
"They become molted."
] | C | train | null | ai2_arc_ARC-Easy |
If the solar system were used as a model of an atom, what would the Sun most likely represent? | [
"an ion",
"a nucleus",
"a neutron",
"an electron"
] | B | train | null | ai2_arc_ARC-Easy |
A student provides the following directions for brushing teeth: • Turn on the water. • Fill the glass with water and leave the water running. • Put toothpaste on the toothbrush. • Brush for two minutes. • Rinse mouth with the water from the glass. • Rinse the toothbrush with the running water. • Turn off the water. Which change in these directions would conserve the most water? | [
"Brush for three minutes.",
"Turn the water off before brushing.",
"Rinse mouth with the running water.",
"Use less toothpaste on the toothbrush."
] | B | train | null | ai2_arc_ARC-Easy |
Which of these shows the correct order for the central dogma of molecular biology? | [
"DNA to protein to RNA",
"RNA to DNA to protein",
"protein to DNA to RNA",
"DNA to RNA to protein"
] | D | train | null | ai2_arc_ARC-Easy |
Meiosis contributes to the process of reproduction by producing what type of cell? | [
"aneuploid",
"diploid",
"haploid",
"polyploid"
] | C | train | null | ai2_arc_ARC-Easy |
The abundance of a mineral at the surface of Earth most likely depends upon the | [
"climate of a particular region.",
"types of elements available in the crust.",
"thicknesses of nearby rock layers.",
"exposure of the elements to the environment."
] | B | train | null | ai2_arc_ARC-Easy |
Which has the greatest effect on aiding the movement of blood through the human body? | [
"tension",
"friction",
"density",
"gravity"
] | D | train | null | ai2_arc_ARC-Easy |
Why should scientists wear goggles during experiments? | [
"to block out bright sunlight",
"to magnify small objects",
"to protect their eyes",
"to see in the dark"
] | C | train | null | ai2_arc_ARC-Easy |
Which of the following organisms produces energy from sunlight? | [
"worm",
"rabbit",
"hawk",
"grass"
] | D | train | null | ai2_arc_ARC-Easy |
Which statement is true for all objects? | [
"All objects are shiny.",
"All objects are hard.",
"All objects are rough.",
"All objects have mass."
] | D | train | null | ai2_arc_ARC-Easy |
Elements in the same column of the Periodic Table of the Elements all | [
"have the same number of protons.",
"share the same atomic structure.",
"have similar physical characteristics.",
"share the same number of neutrons."
] | C | train | null | ai2_arc_ARC-Easy |
What is the main function of scales on a fish? | [
"to protect the fish",
"to attract predators",
"to help the fish find food",
"to help the fish breathe"
] | A | train | null | ai2_arc_ARC-Easy |
Which invention made mass production possible? | [
"the assembly line",
"the airplane",
"the personal computer",
"the telephone"
] | A | train | null | ai2_arc_ARC-Easy |
What causes a meteoroid to glow as it falls through the atmosphere of Earth? | [
"wind",
"gravity",
"friction",
"sunlight"
] | C | train | null | ai2_arc_ARC-Easy |
The cheetah population around the world has decreased because of poaching and loss of habitat. The surviving population is found to have similar alleles. Which factor is endangering the species' survival the most? | [
"harmful genetic mutations",
"shrinking of the gene pool",
"decrease in competition",
"increase in adaptations"
] | B | train | null | ai2_arc_ARC-Easy |
What is generated when the students count and record the number of organisms in the pond water? | [
"data",
"variables",
"a hypothesis",
"a conclusion"
] | A | train | null | ai2_arc_ARC-Easy |
The Mariana Trench is the deepest ocean trench on Earth. This trench occurs at a plate boundary where | [
"one plate is sliding past another.",
"one plate is being forced beneath another.",
"two plates are colliding into each other.",
"two plates are pulling apart from each other."
] | B | train | null | ai2_arc_ARC-Easy |
Students want to find out at which temperature bean plants grow tallest. Which science process skill would be used to find this temperature? | [
"inferring",
"predicting",
"measuring",
"classifying"
] | C | train | null | ai2_arc_ARC-Easy |
When would the highest tides occur along the Texas coast? | [
"at sunrise",
"at sunset",
"during a full moon",
"during a half moon"
] | C | train | null | ai2_arc_ARC-Easy |
Sodium (Na) and chlorine (Cl) combine to form sodium chloride (NaCl), which is commonly known as | [
"soap.",
"vinegar.",
"table salt.",
"baking soda."
] | C | train | null | ai2_arc_ARC-Easy |
It rained on a hot summer afternoon and a puddle formed. After several hours, the puddle was gone. Which two processes made the puddle form and then disappear? | [
"precipitation followed by evaporation",
"deposition followed by evaporation",
"precipitation followed by runoff",
"deposition followed by runoff"
] | A | train | null | ai2_arc_ARC-Easy |
Which environmental problem was directly caused by the invention of the automobile? | [
"storage of nuclear waste",
"increase in air pollution",
"increased use of pesticides",
"flooding in the Midwest"
] | B | train | null | ai2_arc_ARC-Easy |
At some places in Florida, sand on the beaches is being reduced. New sand is brought from other areas and spread on the beaches. What process causes this reduction to the beach sand? | [
"earthquakes",
"erosion",
"landslides",
"weathering"
] | B | train | null | ai2_arc_ARC-Easy |
Which characteristic of a volvox colony makes it more like a multicellular organism than a simple cluster of unicellular organisms? | [
"The cells in the colony respond to stimuli separately.",
"The cells in the colony are arranged in a specific shape.",
"Some cells in the colony are specialized for reproduction.",
"Cells in the colony are connected by strands of cytoplasm."
] | C | train | null | ai2_arc_ARC-Easy |
Students are investigating which type of fruit attracts the most fruit flies. Equally sized pieces of ripe apple, peach, and banana are placed in separate containers. The containers allow fruit flies to enter, but the fruit flies are unable to escape. The containers are placed outside on a picnic table for two days. The most reliable method for collecting data is to count the number of fruit flies | [
"on all three types of fruit every two hours",
"on all three types of fruit after each fruit spoils",
"on the banana on Day 1, the apple on Day 2, and the peach on Day 3",
"on the banana after Hour 1, the apple after Hour 2, and the peach after Hour 3"
] | A | train | null | ai2_arc_ARC-Easy |
Malaria is a common disease in many countries. What is the cause of this disease? | [
"a virus",
"a bacterium",
"a fungus",
"a parasite"
] | D | train | null | ai2_arc_ARC-Easy |
Mold is often found growing on old bread. In a food chain, mold is a ___. | [
"decomposer",
"producer",
"consumer",
"scavenger"
] | A | train | null | ai2_arc_ARC-Easy |
Which form of energy are x rays and ultraviolet light? | [
"nuclear",
"heat",
"electromagnetic",
"chemical"
] | C | train | null | ai2_arc_ARC-Easy |
Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain? | [
"Pacific Ocean",
"Colorado River",
"Sierra Nevada Mountains",
"Columbia River Basin"
] | C | train | null | ai2_arc_ARC-Easy |
Cells come in two basic types, prokaryotic and eukaryotic. Which cell structure is found in both prokaryotic and eukaryotic cells? | [
"vacuole",
"nucleoid",
"mitochondrion",
"cytoplasm"
] | D | train | null | ai2_arc_ARC-Easy |
From which part of the plant does a bee get food? | [
"flower",
"seed",
"stem",
"root"
] | A | train | null | ai2_arc_ARC-Easy |
As Earth revolves around the Sun, the number of daylight hours varies from place to place. In which location would the number of daylight hours remain constant? | [
"North Pole",
"Prime Meridian",
"Equator",
"Antarctica"
] | C | train | null | ai2_arc_ARC-Easy |
Why does tapping a fork against a water glass produce a sound? | [
"The air expands.",
"The fork releases electrons.",
"The particles in the objects vibrate.",
"The water in the glass forms ripples."
] | C | train | null | ai2_arc_ARC-Easy |
A student places a sheet of black construction paper on her desk. What happens to most of the light that strikes the black construction paper? | [
"The light is bent by the paper.",
"The light reflects off the paper.",
"The light is absorbed by the paper.",
"The light passes through the paper."
] | C | train | null | ai2_arc_ARC-Easy |
Which of these groups animals are ALL mammals? | [
"duck, eagle, parrot",
"mouse, monkey, bat",
"butterfly, ant, mosquito",
"crocodile, snake, turtle"
] | B | train | null | ai2_arc_ARC-Easy |
Which part of a plant cell is responsible for controlling the activities of the other parts of the cell? | [
"Vacuole",
"Nucleus",
"Cell wall",
"Chloroplast"
] | B | train | null | ai2_arc_ARC-Easy |
All metabolic functions fall into one of two categories: a breaking down process (catabolic) or a building up process (anabolic). Which is an example of an anabolic process? | [
"respiration",
"protein synthesis",
"oxygen transport",
"carbohydrate digestion"
] | B | train | null | ai2_arc_ARC-Easy |
Clearing forests of trees and vegetation for human development can have major impacts on the ecosystem. Which would most likely occur after a forested area is cleared? | [
"an increase in habitat for wildlife",
"a decrease in food competition",
"an increase in soil erosion",
"a decrease in water runoff"
] | C | train | null | ai2_arc_ARC-Easy |
Which of these is the most responsible for the changes of the seasons on Earth? | [
"Position of the Moon",
"Tilt of Earth on its axis",
"Temperature of the Sun",
"Distance to Mars"
] | B | train | null | ai2_arc_ARC-Easy |
Turning off the light when leaving a room is an example of | [
"conserving energy.",
"wasting energy.",
"using potential energy.",
"using chemical energy."
] | A | train | null | ai2_arc_ARC-Easy |
Which list contains only things that are part of our solar system? | [
"planets, moons, comets",
"galaxies, quasars, asteroids",
"black holes, novas, stars",
"clusters, asteroids, meteors"
] | A | train | null | ai2_arc_ARC-Easy |
A family installs a new heating system in their home. Which is the most desirable result of the new heating system? | [
"producing more noise pollution",
"decreasing the amount of energy used",
"increasing the use of natural resources",
"increasing the time it takes to heat the home"
] | B | train | null | ai2_arc_ARC-Easy |
The Andes Mountains in South America formed when an oceanic plate shifted beneath a continental plate. Which other landforms are usually associated with this type of plate boundary? | [
"barrier islands",
"ocean trenches",
"mid-ocean ridges",
"volcanic island arcs"
] | B | train | null | ai2_arc_ARC-Easy |
Which of the following animals goes through metamorphosis? | [
"alligator",
"frog",
"lizard",
"turtle"
] | B | train | null | ai2_arc_ARC-Easy |
Which group of organisms can make food by a process called chemosynthesis? | [
"scavengers",
"producers",
"consumers",
"decomposers"
] | B | train | null | ai2_arc_ARC-Easy |
Which of these are broken down during chemical, but not physical, changes? | [
"elements",
"mixtures",
"solutions",
"compounds"
] | D | train | null | ai2_arc_ARC-Easy |
Fossils of clam shells were found in the Appalachian Mountains. Which of these statements best explains why the clam shells were found in the Appalachian Mountains? | [
"The mountain range was once under water.",
"Birds flying overhead dropped the clam shells.",
"Animals released the clam shells in their waste.",
"The clams lived on land before moving to water."
] | A | train | null | ai2_arc_ARC-Easy |
When a formula unit of magnesium sulfide, MgS, is separated into magnesium and sulfur particles, the particles are called | [
"molecules.",
"ions.",
"isotopes.",
"compounds."
] | B | train | null | ai2_arc_ARC-Easy |
Which action is an example of an exothermic process? | [
"baking bread",
"cooking an egg",
"making ice cubes",
"evaporation of water"
] | C | train | null | ai2_arc_ARC-Easy |
Which best explains why some reptiles and amphibians lay an abundance of eggs? | [
"It increases the population.",
"The eggs provide food for predators.",
"These animals do not have to stay with their eggs.",
"It increases the chance of some eggs surviving to hatch."
] | D | train | null | ai2_arc_ARC-Easy |
Which is the best example of recycling? | [
"using low energy appliances",
"washing and reusing plastic cups",
"using empty milk cartons as flower planters",
"using aluminum cans to make new products"
] | D | train | null | ai2_arc_ARC-Easy |
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