dpquoc/ARC · Datasets at Hugging Face

Unnamed: 0 int64 0 2.25k	id stringlengths 8 22	question stringlengths 17 683	A stringlengths 1 147	B stringlengths 1 134	C stringlengths 1 153	D stringlengths 1 129 ⌀	answer stringclasses 5 values
1,681	Mercury_7009765	The Theory of Plate Tectonics revolutionized scientific thought because it	explained the movement of oceanic and continental crusts.	demonstrated how tidal forces affect coastlines.	mapped the pattern and frequency of earthquakes.	explained the mineral differences between continents.	A
1,682	AKDE&ED_2008_8_52	How does repeating an experiment improve the likelihood of obtaining accurate results?	Data can be compared.	Time can be decreased.	Equipment can be added.	Procedures can be changed.	A
1,683	Mercury_401504	One hundred grams of water and 100 grams of vegetable oil are heated in identical containers at 70°C for 5 minutes. Their temperatures at the end of 5 minutes are different due to the difference in which property?	volume	specific heat	conductivity	chemical energy	B
1,684	Mercury_SC_401150	There are MORE hours of sunlight in the Northern Hemisphere during which season?	spring	summer	fall	winter	B
1,685	Mercury_SC_415695	Which force produces energy as heat?	pull	gravity	friction	magnetic	C
1,686	Mercury_7109270	Biologists have discovered that the beluga whales of Canada's St. Lawrence River have the highest rates of cancer among animals. What is most likely the reason for this high incidence of cancer in these whales?	chemical and pollutant runoff into the ocean	average temperatures increased in the region	depletion of natural prey from the ecosystem	increased levels of carbon dioxide in the atmosphere	A
1,687	Mercury_7007823	Reading from left to right, elements in the same period on the Periodic Table of the Elements	have the same reactivity.	decrease in atomic mass.	increase in atomic number.	have the same number of electrons.	C
1,688	Mercury_7044660	A device that converts light energy into electricity used in many handheld calculators is a	battery.	photocell.	photo generator.	photovoltaic cell.	D
1,689	ACTAAP_2007_7_12	Which most accurately describes a circle (pie) graph?	used to demonstrate change in temperature only	used to demonstrate change that is continuous	used to demonstrate change that is not continuous	used to describe how part of the data relates to all of the data	D
1,690	MCAS_2001_8_6	Which organisms benefit in the relationship between bees and flowering plants?	only the bees	only the flowering plants	both the bees and the flowering plants	neither the bees nor the flowering plants	C
1,691	Mercury_7122763	The orbit of Earth is almost circular and has a period of about 365 days. Compared to the orbit of Earth, which of these objects usually have highly elliptical orbits and can have periods of over 1000 years?	asteroids	meteorites	comets	moons	C
1,692	Mercury_7236653	How is the theory of plate tectonics different from a hypothesis regarding a certain aspect of plate movement?	The theory addresses an Earth-science topic.	The theory may change if new evidence emerges.	The theory explains a number of related observations.	The theory can be evaluated by a single-variable experiment.	C
1,693	Mercury_7113943	A large quantity of heavy rain falling in a short time period will most likely	reduce the amount of nutrients in the soil.	increase the number of minerals in the soil.	reduce oxygen levels in the soil.	increase the temperature of the soil.	A
1,694	Mercury_7197295	An artificial pacemaker is a device that regulates the beat of the heart by an electrical stimulus. Some early pacemakers were powered by batteries and were worn externally with wires passing through the skin to the surface of the heart. Modern pacemakers are now much smaller and are implanted surgically. Which most likely has increased the lifespan and effectiveness of artificial pacemakers?	the development of thinner wires	the invention of lithium batteries	mass production of pacemaker parts	reducing the cost of producing pacemakers	B
1,695	TIMSS_2003_8_pg93	A balloon filled with helium gas is set free and starts to move upward. Which of the following best explains why the helium balloon moves upward?	The density of helium is less than the density of air.	The air resistance lifts the balloon up.	There is no gravity acting on the helium balloons.	The wind blows the balloon upward.	A
1,696	Mercury_416463	Oscar and Andre used a microscope to observe a sample of pond water and drew an example of each type of organism they saw. Then they compared their drawings. They discovered that their drawings of a euglena and a paramecium were alike, but their amoeba drawings had very different shapes. What are two things that Oscar's amoeba could have been doing that made his drawing look different from Andre's?	eating and moving	moving and digesting	digesting and excreting	excreting and eating	A
1,697	Mercury_SC_401279	The reading on a barometer rises when the air	pressure increases.	pressure decreases.	speed increases.	speed decreases.	A
1,698	CSZ10373	Which of the following processes is responsible for changing liquid water into water vapor?	photosynthesis	condensation	evaporation	precipitation	C
1,699	Mercury_7032585	In an atom, protons plus neutrons make up the atom's	electric charge.	atomic mass.	atomic number.	electron number.	B
1,700	Mercury_7212485	A generator converts mechanical energy to electrical energy by using a conducting metal loop turning in a	magnetic field.	gravitational field.	steel sphere.	copper sphere.	A
1,701	Mercury_SC_405233	Deer live in forest for shelter. If the forest was cut down, which situation would most likely happen?	The deer would find shelter in a different habitat.	The deer would wait for the forest to grow back.	The deer would move to another forest area.	The deer would change the type of foods they eat.	C
1,702	Mercury_7011095	Which physical property is important to have in a material used in cookware?	poor conductor of heat	good conductor of heat	low flexibility	high flexibility	B
1,703	MEA_2013_8_5	Which sentence describes a characteristic of offspring produced by sexual reproduction?	The offspring have half the amount of genetic material as the parents.	The offspring contain genetic material from both parents.	The female offspring contain only genes from the mother.	The male offspring contain only genes from the father.	B
1,704	NCEOGA_2013_8_54	What is involved in creating genetically modified bacteria?	allowing them to reproduce freely	changing their food source	using biotechnology techniques	growing them on selected plants	C
1,705	MCAS_2008_5_5622	Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?	eyes	heart	lungs	tail	C
1,706	Mercury_SC_415703	One cause of heat in a car engine is caused by friction between parts. Which of these reduces the amount of heat produced by friction?	fan	oil	gasoline	battery	B
1,707	Mercury_7166653	The primary functions of the digestive system are to break down food, absorb nutrients and excrete wastes. Once food is absorbed, what system is responsible for carrying the nutrients to the body cells?	respiratory system	circulatory system	nervous system	skeletal system	B
1,708	NAEP_2005_4_S13+4	If you breathe on a mirror, part of the mirror clouds up. What are you actually seeing when you see the mirror cloud up?	Water droplets that formed from cooled water vapor in your breath	Carbon dioxide that you are breathing out from your lungs	Oxygen that you are breathing out from your lungs	Cooled nitrogen in the air around you	A
1,709	VASoL_2011_5_35	The surface of the Moon is made up of	craters, highlands, and flat areas	swirling gases	large bodies of water	a mixture of gases and water	A
1,710	NYSEDREGENTS_2009_8_39	Which sequence correctly shows the levels of increasing organization in the human body?	tissues -> cells -> organ systems -> organs	cells -> tissues -> organs -> organ systems	organs -> organ systems -> cells -> tissues	organ systems -> organs -> tissues -> cells	B
1,711	Mercury_7213063	Which layer of the atmosphere contains the greatest amount of water vapor?	thermosphere	mesosphere	stratosphere	troposphere	D
1,712	Mercury_7121783	What should a scientist do to help make sure the results of an experiment are unbiased?	Keep the results a secret.	Do the math without a calculator.	Change all of the variables in the experiment.	Ask other scientists to attempt to reproduce the results.	D
1,713	Mercury_7205993	Which property of water allows it to dissolve many different substances?	It is a polar molecule.	It contains hydrogen atoms.	It has a high melting point.	It has a low density.	A
1,714	Mercury_7218838	Nevada is much drier than regions in California that are at the same latitude. Compared to these regions in California, which feature of Nevada contributes most to this dry climate?	mountain ranges to the west	high mean elevation	frequent earthquakes	soil with a high sand content	A
1,715	Mercury_7221305	A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?	The acid boiled when poured into the beaker.	The acid and powder formed a new product.	A physical reaction produced a gas mixture.	A reaction occurred that produced heat.	B
1,716	Mercury_LBS10185	Which of the following is visible through a reflecting telescope?	planets around other stars	black holes in deep space	moons around Jupiter	surface of Saturn	C
1,717	Mercury_7081690	A student is using hydrochloric acid in an investigation. Which piece of safety equipment is most important during this investigation?	mask	goggles	fire extinguisher	disinfectant spray	B
1,718	Mercury_7092103	Generally, the deeper rock layers of Earth are older than shallower rock layers. How can the collision of two tectonic plates change the order of the rock layers?	The rock layers contain pollutants that dissolve soil.	The rock layers lack water due to extended droughts.	The rock layers are compressed forming faults and folds.	The rock layers are moved closer to rivers which erode landforms.	C
1,719	Mercury_7044538	Which instrument should a student use to best examine bacteria?	telescope	hand lens	microscope	computer probes	C
1,720	MEAP_2005_5_37	Matter that is vibrating is producing ___.	gas	light	sound	shadows	C
1,721	Mercury_7165900	Falling and rising air and water molecules inside of clouds are believed to be factors in the formation of lightning. Which kind of energy transfer is taking place to cause this weather phenomenon?	electrical to thermal	thermal to mechanical	chemical to mechanical	mechanical to electrical	D
1,722	NYSEDREGENTS_2004_4_2	Sleet, rain, snow, and hail are forms of	erosion	evaporation	groundwater	precipitation	D
1,723	Mercury_SC_400384	A windstorm knocks down many trees in a national park. Timber companies want to get rid of the fallen trees. How would this most likely harm the park ecosystem?	reduces the risk of fire	decreases erosion problems	increases the risk of drought	removes available nutrients	D
1,724	TIMSS_2003_4_pg71	A plant has yellow flowers. What best explains why the flowers are yellow?	The sunshine colored the flowers yellow.	The flowers of the parent plants were yellow.	It was very warm when they flowered.	It rained every day.	B
1,725	Mercury_SC_401203	Which tool is used to determine the mass of an object?	ruler	beaker	balance	thermometer	C
1,726	Mercury_SC_401807	Prairie dogs can run very quickly. This adaptation enables the prairie dog to	attract mates.	intimidate predators.	escape from predators.	chase after their young.	C
1,727	Mercury_7026915	A student has a liquid that does not mix with water. To predict whether the liquid will float on water or sink beneath it, which tools should be used to examine the liquid?	ruler and compass	microscope and voltmeter	graduated cylinder and balance	thermometer and Bunsen burner	C
1,728	Mercury_SC_409179	Samuel investigated the effect of temperature on the growth of snapdragons. He recorded the results from the investigation and found that snapdragons do not grow well in low temperatures. What is the purpose of this conclusion in the scientific process?	It helps to organize the data.	It helps to evaluate the hypothesis.	It helps to prepare for an investigation.	It helps to collect information from observations.	B
1,729	TIMSS_2011_8_pg6	Which of the following best describes the purpose of cellular respiration?	to provide energy for cell activities	to produce sugar for storage in cells	to release oxygen for breathing	to supply carbon dioxide for photosynthesis	A
1,730	MCAS_2016_5_9	In a meadow ecosystem, mice receive most of the energy they need to survive directly from which of the following sources?	minerals	oxygen	plants	water	C
1,731	Mercury_7252700	Which environmental stimulus causes leaves on certain trees to change color in autumn?	loss of nutrients in the forest soil	lower air humidity in the forest	changes to amount of light	competition for survival	C
1,732	NYSEDREGENTS_2011_4_2	How does the length of daylight in New York State change from summer to fall?	It decreases.	It increases.	It remains the same.	null	A
1,733	Mercury_402570	What is the name of the product formed from the reaction shown below? 4Fe(III) + 3O_{2} -> 2Fe_{2}O_{3}	iron (II) oxide	iron (III) oxide	oxygen ferrite	diferrous trioxide	B
1,734	Mercury_186270	What type of galaxy is the Milky Way?	spiral	elliptical	irregular	oval	A
1,735	Mercury_405939	One thing that all human cells have in common is that they	control the brain.	make food.	move blood.	take in energy.	D
1,736	Mercury_7012933	Which two systems of the body are interacting when a runner sprains his ankle?	the nervous system and the digestive system	the digestive system and the circulatory system	the respiratory system and the nervous system	the muscular system and the nervous system	D
1,737	MCAS_2015_5_12	Jupiter is the largest planet in the solar system. It rotates on its axis once about every 10 hours. What time period on Earth would be 10 hours long if Earth rotated on its axis once every 10 hours?	a day	a week	a month	a year	A
1,738	MSA_2013_8_7	The elements sulfur (S) and oxygen (O2) combine to form a substance called sulfur dioxide (SO2). Sulfur dioxide is also formed when coal and oil are burned. Sulfur dioxide can best be described as	a metal	an atom	a compound	a nonreactive gas	C
1,739	Mercury_SC_406619	Which is a major difference between the life cycles of different types of plants?	the way they die	the energy they use	the way they reproduce	the way they make food	C
1,740	Mercury_7058363	Sunlight passes through the windows of a car and causes the car seats to get hot. Which type of energy flow is involved in heating the seats?	conduction	convection	insulation	radiation	D
1,741	Mercury_7010955	When a large oak tree is cut down in a forest, it leaves a gap in the forest canopy which allows smaller trees to quickly grow in the available sunlight. Which interaction is best represented among the smaller trees?	parasitism	mutualism	competition	commensalism	C
1,742	Mercury_7044205	How long does it take for the Moon to rotate on its axis?	one day	one year	one week	one month	D
1,743	NYSEDREGENTS_2004_4_29	What is one way that humans can maintain good health?	sleep all day	exercise daily	eat snacks often	stay up late	B
1,744	OHAT_2007_8_41	Which is an example of a group of cells with a common structure and function?	stomach	muscle tissue	mitochondria	digestive system	B
1,745	Mercury_182315	Sickle cell anemia is a genetic disease caused by an autosomal recessive gene. If each parent carries one sickle cell allele, what are the chances that their child will have sickle cell anemia?	no chance	one in four	two in four	three in four	B
1,746	ACTAAP_2012_7_8	Which statement describes animal embryos?	display all the features of an adult	represent the earliest stage of development	have the same number of cells as a fertilized egg	have half the number of chromosomes as an adult	B
1,747	Mercury_7056350	The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?	higher levels of oxygen in the atmosphere	lower levels of ozone in the atmosphere	higher levels of carbon dioxide in the atmosphere	lower levels of nitrogen in the atmosphere	C
1,748	Mercury_7282573	As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?	discovering new reservoirs of water in the aquifer	reducing water usage through conservation measures	combining hydrogen with oxygen to make water	piping in water from an aquifer elsewhere	B
1,749	Mercury_7133665	Which action illustrates a chemical change?	painting a wood chest	sawing a wood plank	burning wood chips	cutting down a tree	C
1,750	Mercury_SC_403009	Which tool could be used to help someone count the number of ladybugs on a leaf?	hand lens	meter stick	microscope	graduated cylinder	A
1,751	Mercury_7282660	Which two activities use most of the water used in an average U.S. household?	flushing toilets and washing clothes	washing clothes and using sink faucets	using sink faucets and showering	showering and flushing toilets	A
1,752	Mercury_7043523	Which are the best tools to use for growing and studying bacterial cultures?	beakers	Petri dishes	microscopes	graduated cylinders	B
1,753	Mercury_7005023	Which effect would the growing of legume crops such as beans and soybeans have?	increase the efficiency of photosynthesis	greater immunity of crops against diseases	fewer bacteria in soil and in living organisms	more usable nitrogen for other plants	D
1,754	Mercury_7263673	Which relationship between Earth's outer core and inner core generates a large portion of Earth's magnetic field?	their relative masses	their relative motions	their relative diameters	their relative circumferences	B
1,755	NYSEDREGENTS_2007_8_20	Which order of succession of natural communities would most likely occur in New York State?	grasses -> trees -> bushes	trees -> bushes -> grasses	bushes -> grasses -> trees	grasses -> bushes -> trees	D
1,756	Mercury_404686	White light can be separated into all of its component colors by	mixing the three primary colors of light.	passing the light through a prism.	passing the light through a colored filter.	using a translucent material to filter the light.	B
1,757	ACTAAP_2008_7_14	An Italian scientist named Alessandro Volta invented the Voltaic pile in 1800. It was able to produce a steady electrical current. Based on this description, what is the modern equivalent of the Voltaic pile?	a wire	a battery	a resistor	a light bulb	B
1,758	Mercury_SC_408661	Which would cause the most soil to erode from a river bank in just a few days?	animals climbing up the river bank	acid rain falling onto the river bank	heat from the sun drying the river bank	water from a flood flowing over the river bank	D
1,759	Mercury_7072608	A student is measuring a liquid in a graduated cylinder. The student is not tall enough to read the measurement at eye level. Which of these is the best action for the student to take to read the measurement correctly?	stand on a chair	estimate the amount	pour out some of the liquid until it is at eye level	move the graduated cylinder to a lower table	D
1,760	Mercury_SC_401660	When Isaac Newton theorized that gravity caused objects to fall to the ground, he had also discovered the force that causes	chemicals to react.	volcanoes to erupt.	lightning to strike Earth.	the planets to orbit the Sun.	D
1,761	Mercury_7211575	A disorder is associated with certain flaws in the human respiratory system. Which is most likely a typical symptom of this disorder?	poor vision	difficulty breathing	reduced muscle mass	increased saliva production	B
1,762	Mercury_7251073	Which of these is the main contributor to the formation of hurricanes?	high barometric pressure	warm ocean air	calm ocean surface	dense surface air	B
1,763	AKDE&ED_2008_8_37	Which statement correctly describes why there are fewer than 24 hours of daylight in Alaska during each day in April?	Earth’s rotation slows during the day.	Earth’s rotation slows during the night.	Earth’s rotation causes both day and night.	Earth’s tilt on its axis causes both day and night.	C
1,764	Mercury_7269045	What best describes objects orbiting in the Kuiper Belt?	metallic	rocky	hot	icy	D
1,765	Mercury_SC_401651	Coal was made from the remains of which ancient ecosystem?	rocky islands	fertile valleys	green swamps	fast-flowing rivers	C
1,766	Mercury_7086083	Which of these describes a location where minerals are most likely to form?	cooled magma from a volcano	eroded sediment from a riverbed	weathered rock from a canyon	saturated soil from a floodplain	A
1,767	Mercury_SC_401674	In 1971, the bones of an extinct flying dinosaur were discovered. This kind of discovery helps everyone learn more about	impact of humans on Earth.	effect of gravity on animals.	history of animal species on Earth.	likelihood that dinosaurs will reappear.	C
1,768	Mercury_7008295	Which could be a possible way to prevent wildlife species from becoming endangered?	drinking less water	establishing more habitats	cutting down more forests	stopping underground coal mining	B
1,769	Mercury_7026233	The chemical reaction of ethane and oxygen produces carbon dioxide and water. Which is the best form to identify reactants and products of the reaction?	a table	a graph	a diagram	an equation	D
1,770	Mercury_404796	Rheumatoid arthritis is a disease that occurs when the body attacks its own tissues. Which body system becomes disordered first?	immune	nervous	digestive	circulatory	A
1,771	Mercury_7236040	Variation in which property between water at different temperatures contributes most to the formation of horizontal ocean layers having distinct temperatures?	density	viscosity	turbidity	acidity	A
1,772	MEA_2010_8_16-v1	Which event would most likely cause a rapid extinction of organisms?	a large asteroid impact	regional drought	new glacier formation	a decrease in the growth of weeds	A
1,773	Mercury_SC_409556	When an octopus feels threatened, it can release black ink into the water. The ink MOST likely helps the octopus	move quickly through the water.	breathe oxygen from the water.	hide from predators.	use food faster.	C
1,774	NCEOGA_2013_8_34	Which is a way the agricultural biotechnology industry could have a positive impact on the environment?	by producing crops that are virus resistant	by making robots to replace large farm machines	by reducing the need for countries to import food	by increasing the use of wind farms that produce electricity	C
1,775	Mercury_7084070	The following statements are from an article in a fitness magazine. Which of these is an opinion?	Exercise increases muscle mass.	Regular exercise reduces resting heart rate.	People should exercise because it makes them feel better.	Those who exercise regularly can increase their life span.	C
1,776	Mercury_SC_415729	Which pair of items will repel each other?	a positively-charged wool sock and a neutral plastic bag	a neutral cotton sweater and a negatively-charged plastic pellet	a negatively-charged balloon and a positively-charged piece of paper	a negatively-charged plastic strip and a negatively-charged piece of cloth	D
1,777	NAEP_2005_8_S13+2	In your body, what two organs work together to make sure that oxygen gets to all the other organs of your body?	Lungs and kidneys	Heart and lungs	Brain and kidneys	Heart and liver	B
1,778	Mercury_7166635	Each organ in the digestive system has a specific function. During digestion, food passes from the stomach into the small intestine. Which statement best describes what takes place in the small intestine?	Nutrients are absorbed from the food.	Wastes are prepared to pass out of the body.	Food is churned with acid to break down proteins.	Excess water is reabsorbed into the blood stream.	A
1,779	Mercury_417467	Which structure is found in producers in nearly all ecosystems?	stems	leaves	rhizomes	chloroplasts	D
1,780	NCEOGA_2013_8_58	A strawberry farmer finds that, after a hard freeze, some of his strawberries are still alive. Which best explains why these strawberries were able to survive?	They have larger leaves to protect the fruit than the other strawberries.	They have different genetic variations that cause them to be more resistant to cold temperatures.	They are able to reproduce more quickly than the other strawberries.	The color of the strawberries is darker, and they maintain their temperature better than other strawberries.	B

1,681

Mercury_7009765

The Theory of Plate Tectonics revolutionized scientific thought because it

explained the movement of oceanic and continental crusts.

demonstrated how tidal forces affect coastlines.

mapped the pattern and frequency of earthquakes.

explained the mineral differences between continents.

A

1,682

AKDE&ED_2008_8_52

How does repeating an experiment improve the likelihood of obtaining accurate results?

Data can be compared.

Time can be decreased.

Equipment can be added.

Procedures can be changed.

A

1,683

Mercury_401504

One hundred grams of water and 100 grams of vegetable oil are heated in identical containers at 70°C for 5 minutes. Their temperatures at the end of 5 minutes are different due to the difference in which property?

volume

specific heat

conductivity

chemical energy

B

1,684

Mercury_SC_401150

There are MORE hours of sunlight in the Northern Hemisphere during which season?

spring

summer

fall

winter

B

1,685

Mercury_SC_415695

Which force produces energy as heat?

pull

gravity

friction

magnetic

C

1,686

Mercury_7109270

Biologists have discovered that the beluga whales of Canada's St. Lawrence River have the highest rates of cancer among animals. What is most likely the reason for this high incidence of cancer in these whales?

chemical and pollutant runoff into the ocean

average temperatures increased in the region

depletion of natural prey from the ecosystem

increased levels of carbon dioxide in the atmosphere

A

1,687

Mercury_7007823

Reading from left to right, elements in the same period on the Periodic Table of the Elements

have the same reactivity.

decrease in atomic mass.

increase in atomic number.

have the same number of electrons.

C

1,688

Mercury_7044660

A device that converts light energy into electricity used in many handheld calculators is a

battery.

photocell.

photo generator.

photovoltaic cell.

D

1,689

ACTAAP_2007_7_12

Which most accurately describes a circle (pie) graph?

used to demonstrate change in temperature only

used to demonstrate change that is continuous

used to demonstrate change that is not continuous

used to describe how part of the data relates to all of the data

D

1,690

MCAS_2001_8_6

Which organisms benefit in the relationship between bees and flowering plants?

only the bees

only the flowering plants

both the bees and the flowering plants

neither the bees nor the flowering plants

C

1,691

Mercury_7122763

The orbit of Earth is almost circular and has a period of about 365 days. Compared to the orbit of Earth, which of these objects usually have highly elliptical orbits and can have periods of over 1000 years?

asteroids

meteorites

comets

moons

C

1,692

Mercury_7236653

How is the theory of plate tectonics different from a hypothesis regarding a certain aspect of plate movement?

The theory addresses an Earth-science topic.

The theory may change if new evidence emerges.

The theory explains a number of related observations.

The theory can be evaluated by a single-variable experiment.

C

1,693

Mercury_7113943

A large quantity of heavy rain falling in a short time period will most likely

reduce the amount of nutrients in the soil.

increase the number of minerals in the soil.

reduce oxygen levels in the soil.

increase the temperature of the soil.

A

1,694

Mercury_7197295

An artificial pacemaker is a device that regulates the beat of the heart by an electrical stimulus. Some early pacemakers were powered by batteries and were worn externally with wires passing through the skin to the surface of the heart. Modern pacemakers are now much smaller and are implanted surgically. Which most likely has increased the lifespan and effectiveness of artificial pacemakers?

the development of thinner wires

the invention of lithium batteries

mass production of pacemaker parts

reducing the cost of producing pacemakers

B

1,695

TIMSS_2003_8_pg93

A balloon filled with helium gas is set free and starts to move upward. Which of the following best explains why the helium balloon moves upward?

The density of helium is less than the density of air.

The air resistance lifts the balloon up.

There is no gravity acting on the helium balloons.

The wind blows the balloon upward.

A

1,696

Mercury_416463

Oscar and Andre used a microscope to observe a sample of pond water and drew an example of each type of organism they saw. Then they compared their drawings. They discovered that their drawings of a euglena and a paramecium were alike, but their amoeba drawings had very different shapes. What are two things that Oscar's amoeba could have been doing that made his drawing look different from Andre's?

eating and moving

moving and digesting

digesting and excreting

excreting and eating

A

1,697

Mercury_SC_401279

The reading on a barometer rises when the air

pressure increases.

pressure decreases.

speed increases.

speed decreases.

A

1,698

CSZ10373

Which of the following processes is responsible for changing liquid water into water vapor?

photosynthesis

condensation

evaporation

precipitation

C

1,699

Mercury_7032585

In an atom, protons plus neutrons make up the atom's

electric charge.

atomic mass.

atomic number.

electron number.

B

1,700

Mercury_7212485

A generator converts mechanical energy to electrical energy by using a conducting metal loop turning in a

magnetic field.

gravitational field.

steel sphere.

copper sphere.

A

1,701

Mercury_SC_405233

Deer live in forest for shelter. If the forest was cut down, which situation would most likely happen?

The deer would find shelter in a different habitat.

The deer would wait for the forest to grow back.

The deer would move to another forest area.

The deer would change the type of foods they eat.

C

1,702

Mercury_7011095

Which physical property is important to have in a material used in cookware?

poor conductor of heat

good conductor of heat

low flexibility

high flexibility

B

1,703

MEA_2013_8_5

Which sentence describes a characteristic of offspring produced by sexual reproduction?

The offspring have half the amount of genetic material as the parents.

The offspring contain genetic material from both parents.

The female offspring contain only genes from the mother.

The male offspring contain only genes from the father.

B

1,704

NCEOGA_2013_8_54

What is involved in creating genetically modified bacteria?

allowing them to reproduce freely

changing their food source

using biotechnology techniques

growing them on selected plants

C

1,705

MCAS_2008_5_5622

Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?

eyes

heart

lungs

tail

C

1,706

Mercury_SC_415703

One cause of heat in a car engine is caused by friction between parts. Which of these reduces the amount of heat produced by friction?

fan

oil

gasoline

battery

B

1,707

Mercury_7166653

The primary functions of the digestive system are to break down food, absorb nutrients and excrete wastes. Once food is absorbed, what system is responsible for carrying the nutrients to the body cells?

respiratory system

circulatory system

nervous system

skeletal system

B

1,708

NAEP_2005_4_S13+4

If you breathe on a mirror, part of the mirror clouds up. What are you actually seeing when you see the mirror cloud up?

Water droplets that formed from cooled water vapor in your breath

Carbon dioxide that you are breathing out from your lungs

Oxygen that you are breathing out from your lungs

Cooled nitrogen in the air around you

A

1,709

VASoL_2011_5_35

The surface of the Moon is made up of

craters, highlands, and flat areas

swirling gases

large bodies of water

a mixture of gases and water

A

1,710

NYSEDREGENTS_2009_8_39

Which sequence correctly shows the levels of increasing organization in the human body?

tissues -> cells -> organ systems -> organs

cells -> tissues -> organs -> organ systems

organs -> organ systems -> cells -> tissues

organ systems -> organs -> tissues -> cells

B

1,711

Mercury_7213063

Which layer of the atmosphere contains the greatest amount of water vapor?

thermosphere

mesosphere

stratosphere

troposphere

D

1,712

Mercury_7121783

What should a scientist do to help make sure the results of an experiment are unbiased?

Keep the results a secret.

Do the math without a calculator.

Change all of the variables in the experiment.

Ask other scientists to attempt to reproduce the results.

D

1,713

Mercury_7205993

Which property of water allows it to dissolve many different substances?

It is a polar molecule.

It contains hydrogen atoms.

It has a high melting point.

It has a low density.

A

1,714

Mercury_7218838

Nevada is much drier than regions in California that are at the same latitude. Compared to these regions in California, which feature of Nevada contributes most to this dry climate?

mountain ranges to the west

high mean elevation

frequent earthquakes

soil with a high sand content

A

1,715

Mercury_7221305

A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?

The acid boiled when poured into the beaker.

The acid and powder formed a new product.

A physical reaction produced a gas mixture.

A reaction occurred that produced heat.

B

1,716

Mercury_LBS10185

Which of the following is visible through a reflecting telescope?

planets around other stars

black holes in deep space

moons around Jupiter

surface of Saturn

C

1,717

Mercury_7081690

A student is using hydrochloric acid in an investigation. Which piece of safety equipment is most important during this investigation?

mask

goggles

fire extinguisher

disinfectant spray

B

1,718

Mercury_7092103

Generally, the deeper rock layers of Earth are older than shallower rock layers. How can the collision of two tectonic plates change the order of the rock layers?

The rock layers contain pollutants that dissolve soil.

The rock layers lack water due to extended droughts.

The rock layers are compressed forming faults and folds.

The rock layers are moved closer to rivers which erode landforms.

C

1,719

Mercury_7044538

Which instrument should a student use to best examine bacteria?

telescope

hand lens

microscope

computer probes

C

1,720

MEAP_2005_5_37

Matter that is vibrating is producing ___.

gas

light

sound

shadows

C

1,721

Mercury_7165900

Falling and rising air and water molecules inside of clouds are believed to be factors in the formation of lightning. Which kind of energy transfer is taking place to cause this weather phenomenon?

electrical to thermal

thermal to mechanical

chemical to mechanical

mechanical to electrical

D

1,722

NYSEDREGENTS_2004_4_2

Sleet, rain, snow, and hail are forms of

erosion

evaporation

groundwater

precipitation

D

1,723

Mercury_SC_400384

A windstorm knocks down many trees in a national park. Timber companies want to get rid of the fallen trees. How would this most likely harm the park ecosystem?

reduces the risk of fire

decreases erosion problems

increases the risk of drought

removes available nutrients

D

1,724

TIMSS_2003_4_pg71

A plant has yellow flowers. What best explains why the flowers are yellow?

The sunshine colored the flowers yellow.

The flowers of the parent plants were yellow.

It was very warm when they flowered.

It rained every day.

B

1,725

Mercury_SC_401203

Which tool is used to determine the mass of an object?

ruler

beaker

balance

thermometer

C

1,726

Mercury_SC_401807

Prairie dogs can run very quickly. This adaptation enables the prairie dog to

attract mates.

intimidate predators.

escape from predators.

chase after their young.

C

1,727

Mercury_7026915

A student has a liquid that does not mix with water. To predict whether the liquid will float on water or sink beneath it, which tools should be used to examine the liquid?

ruler and compass

microscope and voltmeter

graduated cylinder and balance

thermometer and Bunsen burner

C

1,728

Mercury_SC_409179

Samuel investigated the effect of temperature on the growth of snapdragons. He recorded the results from the investigation and found that snapdragons do not grow well in low temperatures. What is the purpose of this conclusion in the scientific process?

It helps to organize the data.

It helps to evaluate the hypothesis.

It helps to prepare for an investigation.

It helps to collect information from observations.

B

1,729

TIMSS_2011_8_pg6

Which of the following best describes the purpose of cellular respiration?

to provide energy for cell activities

to produce sugar for storage in cells

to release oxygen for breathing

to supply carbon dioxide for photosynthesis

A

1,730

MCAS_2016_5_9

In a meadow ecosystem, mice receive most of the energy they need to survive directly from which of the following sources?

minerals

oxygen

plants

water

C

1,731

Mercury_7252700

Which environmental stimulus causes leaves on certain trees to change color in autumn?

loss of nutrients in the forest soil

lower air humidity in the forest

changes to amount of light

competition for survival

C

1,732

NYSEDREGENTS_2011_4_2

How does the length of daylight in New York State change from summer to fall?

It decreases.

It increases.

It remains the same.

null

A

1,733

Mercury_402570

What is the name of the product formed from the reaction shown below? 4Fe(III) + 3O_{2} -> 2Fe_{2}O_{3}

iron (II) oxide

iron (III) oxide

oxygen ferrite

diferrous trioxide

B

1,734

Mercury_186270

What type of galaxy is the Milky Way?

spiral

elliptical

irregular

oval

A

1,735

Mercury_405939

One thing that all human cells have in common is that they

control the brain.

make food.

move blood.

take in energy.

D

1,736

Mercury_7012933

Which two systems of the body are interacting when a runner sprains his ankle?

the nervous system and the digestive system

the digestive system and the circulatory system

the respiratory system and the nervous system

the muscular system and the nervous system

D

1,737

MCAS_2015_5_12

Jupiter is the largest planet in the solar system. It rotates on its axis once about every 10 hours. What time period on Earth would be 10 hours long if Earth rotated on its axis once every 10 hours?

a day

a week

a month

a year

A

1,738

MSA_2013_8_7

The elements sulfur (S) and oxygen (O2) combine to form a substance called sulfur dioxide (SO2). Sulfur dioxide is also formed when coal and oil are burned. Sulfur dioxide can best be described as

a metal

an atom

a compound

a nonreactive gas

C

1,739

Mercury_SC_406619

Which is a major difference between the life cycles of different types of plants?

the way they die

the energy they use

the way they reproduce

the way they make food

C

1,740

Mercury_7058363

Sunlight passes through the windows of a car and causes the car seats to get hot. Which type of energy flow is involved in heating the seats?

conduction

convection

insulation

radiation

D

1,741

Mercury_7010955

When a large oak tree is cut down in a forest, it leaves a gap in the forest canopy which allows smaller trees to quickly grow in the available sunlight. Which interaction is best represented among the smaller trees?

parasitism

mutualism

competition

commensalism

C

1,742

Mercury_7044205

How long does it take for the Moon to rotate on its axis?

one day

one year

one week

one month

D

1,743

NYSEDREGENTS_2004_4_29

What is one way that humans can maintain good health?

sleep all day

exercise daily

eat snacks often

stay up late

B

1,744

OHAT_2007_8_41

Which is an example of a group of cells with a common structure and function?

stomach

muscle tissue

mitochondria

digestive system

B

1,745

Mercury_182315

Sickle cell anemia is a genetic disease caused by an autosomal recessive gene. If each parent carries one sickle cell allele, what are the chances that their child will have sickle cell anemia?

no chance

one in four

two in four

three in four

B

1,746

ACTAAP_2012_7_8

Which statement describes animal embryos?

display all the features of an adult

represent the earliest stage of development

have the same number of cells as a fertilized egg

have half the number of chromosomes as an adult

B

1,747

Mercury_7056350

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

higher levels of oxygen in the atmosphere

lower levels of ozone in the atmosphere

higher levels of carbon dioxide in the atmosphere

lower levels of nitrogen in the atmosphere

C

1,748

Mercury_7282573

As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?

discovering new reservoirs of water in the aquifer

reducing water usage through conservation measures

combining hydrogen with oxygen to make water

piping in water from an aquifer elsewhere

B

1,749

Mercury_7133665

Which action illustrates a chemical change?

painting a wood chest

sawing a wood plank

burning wood chips

cutting down a tree

C

1,750

Mercury_SC_403009

Which tool could be used to help someone count the number of ladybugs on a leaf?

hand lens

meter stick

microscope

graduated cylinder

A

1,751

Mercury_7282660

Which two activities use most of the water used in an average U.S. household?

flushing toilets and washing clothes

washing clothes and using sink faucets

using sink faucets and showering

showering and flushing toilets

A

1,752

Mercury_7043523

Which are the best tools to use for growing and studying bacterial cultures?

beakers

Petri dishes

microscopes

graduated cylinders

B

1,753

Mercury_7005023

Which effect would the growing of legume crops such as beans and soybeans have?

increase the efficiency of photosynthesis

greater immunity of crops against diseases

fewer bacteria in soil and in living organisms

more usable nitrogen for other plants

D

1,754

Mercury_7263673

Which relationship between Earth's outer core and inner core generates a large portion of Earth's magnetic field?

their relative masses

their relative motions

their relative diameters

their relative circumferences

B

1,755

NYSEDREGENTS_2007_8_20

Which order of succession of natural communities would most likely occur in New York State?

grasses -> trees -> bushes

trees -> bushes -> grasses

bushes -> grasses -> trees

grasses -> bushes -> trees

D

1,756

Mercury_404686

White light can be separated into all of its component colors by

mixing the three primary colors of light.

passing the light through a prism.

passing the light through a colored filter.

using a translucent material to filter the light.

B

1,757

ACTAAP_2008_7_14

An Italian scientist named Alessandro Volta invented the Voltaic pile in 1800. It was able to produce a steady electrical current. Based on this description, what is the modern equivalent of the Voltaic pile?

a wire

a battery

a resistor

a light bulb

B

1,758

Mercury_SC_408661

Which would cause the most soil to erode from a river bank in just a few days?

animals climbing up the river bank

acid rain falling onto the river bank

heat from the sun drying the river bank

water from a flood flowing over the river bank

D

1,759

Mercury_7072608

A student is measuring a liquid in a graduated cylinder. The student is not tall enough to read the measurement at eye level. Which of these is the best action for the student to take to read the measurement correctly?

stand on a chair

estimate the amount

pour out some of the liquid until it is at eye level

move the graduated cylinder to a lower table

D

1,760

Mercury_SC_401660

When Isaac Newton theorized that gravity caused objects to fall to the ground, he had also discovered the force that causes

chemicals to react.

volcanoes to erupt.

lightning to strike Earth.

the planets to orbit the Sun.

D

1,761

Mercury_7211575

A disorder is associated with certain flaws in the human respiratory system. Which is most likely a typical symptom of this disorder?

poor vision

difficulty breathing

reduced muscle mass

increased saliva production

B

1,762

Mercury_7251073

Which of these is the main contributor to the formation of hurricanes?

high barometric pressure

warm ocean air

calm ocean surface

dense surface air

B

1,763

AKDE&ED_2008_8_37

Which statement correctly describes why there are fewer than 24 hours of daylight in Alaska during each day in April?

Earth’s rotation slows during the day.

Earth’s rotation slows during the night.

Earth’s rotation causes both day and night.

Earth’s tilt on its axis causes both day and night.

C

1,764

Mercury_7269045

What best describes objects orbiting in the Kuiper Belt?

metallic

rocky

hot

icy

D

1,765

Mercury_SC_401651

Coal was made from the remains of which ancient ecosystem?

rocky islands

fertile valleys

green swamps

fast-flowing rivers

C

1,766

Mercury_7086083

Which of these describes a location where minerals are most likely to form?

cooled magma from a volcano

eroded sediment from a riverbed

weathered rock from a canyon

saturated soil from a floodplain

A

1,767

Mercury_SC_401674

In 1971, the bones of an extinct flying dinosaur were discovered. This kind of discovery helps everyone learn more about

impact of humans on Earth.

effect of gravity on animals.

history of animal species on Earth.

likelihood that dinosaurs will reappear.

C

1,768

Mercury_7008295

Which could be a possible way to prevent wildlife species from becoming endangered?

drinking less water

establishing more habitats

cutting down more forests

stopping underground coal mining

B

1,769

Mercury_7026233

The chemical reaction of ethane and oxygen produces carbon dioxide and water. Which is the best form to identify reactants and products of the reaction?

a table

a graph

a diagram

an equation

D

1,770

Mercury_404796

Rheumatoid arthritis is a disease that occurs when the body attacks its own tissues. Which body system becomes disordered first?

immune

nervous

digestive

circulatory

A

1,771

Mercury_7236040

Variation in which property between water at different temperatures contributes most to the formation of horizontal ocean layers having distinct temperatures?

density

viscosity

turbidity

acidity

A

1,772

MEA_2010_8_16-v1

Which event would most likely cause a rapid extinction of organisms?

a large asteroid impact

regional drought

new glacier formation

a decrease in the growth of weeds

A

1,773

Mercury_SC_409556

When an octopus feels threatened, it can release black ink into the water. The ink MOST likely helps the octopus

move quickly through the water.

breathe oxygen from the water.

hide from predators.

use food faster.

C

1,774

NCEOGA_2013_8_34

Which is a way the agricultural biotechnology industry could have a positive impact on the environment?

by producing crops that are virus resistant

by making robots to replace large farm machines

by reducing the need for countries to import food

by increasing the use of wind farms that produce electricity

C

1,775

Mercury_7084070

The following statements are from an article in a fitness magazine. Which of these is an opinion?

Exercise increases muscle mass.

Regular exercise reduces resting heart rate.

People should exercise because it makes them feel better.

Those who exercise regularly can increase their life span.

C

1,776

Mercury_SC_415729

Which pair of items will repel each other?

a positively-charged wool sock and a neutral plastic bag

a neutral cotton sweater and a negatively-charged plastic pellet

a negatively-charged balloon and a positively-charged piece of paper

a negatively-charged plastic strip and a negatively-charged piece of cloth

D

1,777

NAEP_2005_8_S13+2

In your body, what two organs work together to make sure that oxygen gets to all the other organs of your body?

Lungs and kidneys

Heart and lungs

Brain and kidneys

Heart and liver

B

1,778

Mercury_7166635

Each organ in the digestive system has a specific function. During digestion, food passes from the stomach into the small intestine. Which statement best describes what takes place in the small intestine?

Nutrients are absorbed from the food.

Wastes are prepared to pass out of the body.

Food is churned with acid to break down proteins.

Excess water is reabsorbed into the blood stream.

A

1,779

Mercury_417467

Which structure is found in producers in nearly all ecosystems?

stems

leaves

rhizomes

chloroplasts

D

1,780

NCEOGA_2013_8_58

A strawberry farmer finds that, after a hard freeze, some of his strawberries are still alive. Which best explains why these strawberries were able to survive?

They have larger leaves to protect the fruit than the other strawberries.

They have different genetic variations that cause them to be more resistant to cold temperatures.

They are able to reproduce more quickly than the other strawberries.

The color of the strawberries is darker, and they maintain their temperature better than other strawberries.

B