id
stringlengths 8
27
| question
stringlengths 1
1.87k
| choices
listlengths 4
4
| answer
stringclasses 4
values | dataset
stringclasses 7
values | rationale
stringclasses 537
values |
|---|---|---|---|---|---|
arceasy_train_213
|
Which human activity is most harmful to the natural environment?
|
[
"swimming in a lake",
"riding a bicycle",
"cutting down a rain forest",
"using solar energy"
] |
C
|
arceasy
| null |
arceasy_train_214
|
The process of digestion breaks down proteins into smaller molecules that are used to rebuild other proteins. During digestion, proteins undergo
|
[
"cell division.",
"nuclear reactions.",
"natural selection.",
"chemical changes."
] |
D
|
arceasy
| null |
arceasy_train_215
|
Blood is composed of different cell types that transport nutrients and wastes throughout the body. Because of this, blood is classified as
|
[
"a tissue.",
"an organ.",
"a system.",
"an organism."
] |
A
|
arceasy
| null |
arceasy_train_216
|
What should a student do when a glass beaker shatters during a laboratory experiment?
|
[
"Notify the teacher.",
"Sweep the pieces into a pile.",
"Pick up the pieces and throw them away.",
"Leave it until the experiment is complete."
] |
A
|
arceasy
| null |
arceasy_train_217
|
An astronomical unit (AU) refers to the distance between
|
[
"Earth and the Sun.",
"the Moon and the Sun.",
"Earth and the Moon.",
"the Sun and the nearest star."
] |
A
|
arceasy
| null |
arceasy_train_218
|
An organ pipe produces a musical note same number of nitrogen gas molecules. with a wavelength of 2.72 m. What is the frequency of this note if the speed of sound is 348 m/s?
|
[
"85.7 Hz",
"128 Hz",
"260 Hz",
"466 Hz"
] |
B
|
arceasy
| null |
arceasy_train_219
|
Which of the following allows the planets to stay in orbit?
|
[
"the Moon's gravity",
"the Sun's gravity",
"magnetism",
"rotation"
] |
B
|
arceasy
| null |
arceasy_train_220
|
Which of these involves the formation of a new chemical substance?
|
[
"evaporation of gasoline",
"mixing salt and pepper",
"dissolving sugar in tea",
"rusting of an iron chain"
] |
D
|
arceasy
| null |
arceasy_train_221
|
Water causes weathering when it
|
[
"melts rock.",
"forms deltas.",
"erodes rock in its path.",
"moves rock along a fault."
] |
C
|
arceasy
| null |
arceasy_train_222
|
Which of these statements about nonrenewable resources is true?
|
[
"They are inexpensive.",
"They help keep the air clean.",
"They can take millions of years to form.",
"They are used because they are easily removed from the ground."
] |
C
|
arceasy
| null |
arceasy_train_223
|
Which statement best identifies a living thing that depends on another living thing to survive?
|
[
"A wolf drinks water.",
"A moose eats a plant.",
"A spruce tree grows in soil.",
"A salmonberry plant absorbs sunlight."
] |
B
|
arceasy
| null |
arceasy_train_224
|
A student is playing with a small toy boat on a pond. The student throws a rock in the pond. This creates waves that move the boat toward the shore. The boat moves toward the shore because the waves transfer
|
[
"energy.",
"heat.",
"motion.",
"water."
] |
A
|
arceasy
| null |
arceasy_train_225
|
A geologist finds a layer of shale near the surface from a certain time period. Nearby, the geologist finds the same layer of shale, but it is deeper underground than the first layer. What might have caused the difference in the depth of the shale layer?
|
[
"a meteorite",
"a fault",
"ancient fossils",
"animal life"
] |
B
|
arceasy
| null |
arceasy_train_226
|
The pull of gravity on Earth is caused by
|
[
"air pressure.",
"the mass of Earth.",
"volcanoes erupting.",
"Earth's orbit around the Sun."
] |
B
|
arceasy
| null |
arceasy_train_228
|
Structural geologists study rock formations to determine the type of environment in which the rocks formed and the events that shaped the rocks. Paleontologists study fossils found in rock formations. Scientists in both these fields have a common interest in discovering the
|
[
"history and processes of Earth.",
"elements that make up the crust.",
"types of minerals that make up sediments.",
"relationships between Earth and other planets."
] |
A
|
arceasy
| null |
arceasy_train_229
|
A simple machine that helps move a flag up a flagpole is
|
[
"a bar magnet",
"an inclined plane",
"a pulley",
"a lever"
] |
C
|
arceasy
| null |
arceasy_train_230
|
Which cellular structure allows nutrients to pass into cells?
|
[
"mitochondrion",
"nucleus",
"membrane",
"chloroplast"
] |
C
|
arceasy
| null |
arceasy_train_231
|
An example of a renewable resource is
|
[
"oil.",
"coal.",
"wood.",
"natural gas."
] |
C
|
arceasy
| null |
arceasy_train_232
|
Minerals are formed by which process?
|
[
"magma cooling",
"fault lines moving",
"metamorphosis",
"sedimentation"
] |
A
|
arceasy
| null |
arceasy_train_233
|
Which of these best defines the term "pollutant"?
|
[
"anything humans add to the atmosphere and oceans",
"any substance that is harmful to the environment",
"any substance that is a waste product of industry",
"a substance that does not break down over time"
] |
B
|
arceasy
| null |
arceasy_train_234
|
The periodic table of the elements is systematically organized according to the
|
[
"rate at which the elements chemically react.",
"hardness of the elements.",
"structure of the atoms of the elements.",
"radioactivity of the atoms of the elements."
] |
C
|
arceasy
| null |
arceasy_train_236
|
Repeated exposure to extremely loud sounds can reduce hearing ability by direct damage to which structures?
|
[
"the sensory neurons in the ears",
"interneurons between the ears and the brain",
"the sound-processing center in the brain",
"motor neurons applying commands from the brain to the ears"
] |
A
|
arceasy
| null |
arceasy_train_237
|
What does a mirror do to light that causes objects to appear backwards?
|
[
"refracts",
"reflects",
"absorbs",
"blocks"
] |
B
|
arceasy
| null |
arceasy_train_238
|
The formation of the mineral halite is most likely to occur by which process?
|
[
"the evaporation of seawater",
"the hardening of lava in seawater",
"the cementing together of sediment particles",
"the slow crystallization of magma deep in the crust"
] |
A
|
arceasy
| null |
arceasy_train_239
|
A student wants to design an experiment regarding the behavior of crickets. Which is the best question to ask to begin the experiment?
|
[
"Do crickets have 6 legs or 8 legs?",
"How long are the antennae of a cricket?",
"Do crickets chirp more during the day or at night?",
"What is the most common cricket species?"
] |
C
|
arceasy
| null |
arceasy_train_240
|
Decomposers are organisms that eat and break down dead plant and animal material. Which organism is a decomposer?
|
[
"algae",
"moss",
"bacteria",
"fish"
] |
C
|
arceasy
| null |
arceasy_train_241
|
An area received six inches of snow during the winter. Before the snow can continue through the water cycle as ground water or runoff, it must first ___.
|
[
"condense",
"evaporate",
"freeze",
"melt"
] |
D
|
arceasy
| null |
arceasy_train_242
|
New vaccines for diseases are being developed all the time. How do vaccines most likely help people?
|
[
"Vaccines help prevent illnesses.",
"Vaccines keep the environment cleaner.",
"Vaccines help cure people who are sick.",
"Vaccines kill bacteria that cause infections."
] |
A
|
arceasy
| null |
arceasy_train_243
|
The cell cycle describes the processes that take place as a cell
|
[
"absorbs nutrients.",
"makes proteins.",
"repairs old cells.",
"forms new cells."
] |
D
|
arceasy
| null |
arceasy_train_244
|
A company that makes fences started using a new material instead of wood. The new material will last longer than wood. What is the most likely benefit of the new material?
|
[
"The new material will keep people safe.",
"The new material will keep pets contained.",
"The new material can make a yard attractive.",
"The new material can save money on replacements."
] |
D
|
arceasy
| null |
arceasy_train_245
|
Which best explains how the Appalachian Mountains formed?
|
[
"an ancient river flooded",
"an earthquake folded land",
"tectonic plates pulled apart",
"tectonic plates collided"
] |
D
|
arceasy
| null |
arceasy_train_246
|
Which is a source of sound?
|
[
"thermal energy",
"potential energy",
"a vibration",
"a medium"
] |
C
|
arceasy
| null |
arceasy_train_247
|
Which natural material is best for making a table?
|
[
"cotton that is lightweight",
"leather that can twist",
"paper that can tear",
"wood that is sturdy"
] |
D
|
arceasy
| null |
arceasy_train_248
|
A class is studying textures and collects several samples. Which of these items would the students most likely use magnification to study?
|
[
"hair",
"cheese",
"plastic spoon",
"aluminum foil"
] |
A
|
arceasy
| null |
arceasy_train_249
|
Over several years, a scientist successfully isolates a species of flower for white color. This year, when the new generation of flowers blooms, one yellow flower is found in the population. Which is the best reason for the appearance of a new flower color within the species?
|
[
"adaptation",
"replication",
"genetic mutation",
"homologous recombination"
] |
C
|
arceasy
| null |
arceasy_train_250
|
What type of precipitation occurs when raindrops freeze as they fall?
|
[
"hail",
"frost",
"sleet",
"snow"
] |
C
|
arceasy
| null |
arceasy_train_251
|
In the atomic model that includes a nucleus, the positive charge is
|
[
"spread evenly throughout the model.",
"located at multiple sites in the model.",
"concentrated in the center of the model.",
"positioned outside the center of the model."
] |
C
|
arceasy
| null |
arceasy_train_252
|
A student used two long wires to connect a lightbulb to a battery. The student noticed that as soon as the circuit was complete, a nearby compass started to point in a direction other than north. The compass pointed in a different direction because it was reacting to the
|
[
"heat produced by the lightbulb.",
"light produced by the lightbulb.",
"electric field produced by the battery.",
"magnetic field produced by the electric current."
] |
D
|
arceasy
| null |
arceasy_train_253
|
The production of sweat is typically a response to an increase in the body's
|
[
"blood circulation.",
"temperature.",
"respiration.",
"heart rate."
] |
B
|
arceasy
| null |
arceasy_train_254
|
Which of the following converts electrical energy into motion?
|
[
"light switch",
"electric stove",
"light bulb",
"electric fan"
] |
D
|
arceasy
| null |
arceasy_train_255
|
What happens at the boiling point of a substance?
|
[
"liquid becomes a gas",
"solid becomes a gas",
"liquid becomes a solid",
"solid becomes a liquid"
] |
A
|
arceasy
| null |
arceasy_train_256
|
How do producers get energy?
|
[
"eating plants and seeds",
"eating other animals",
"breaking down organisms through decay",
"using the sun to make food"
] |
D
|
arceasy
| null |
arceasy_train_257
|
In an investigation, a student wants to see how a ball is affected by rolling it over a surface covered with sandpaper. In preparation for the trial, the student makes a list of the possible conditions that could affect the investigation. The student is most likely listing the
|
[
"constants.",
"variables.",
"controls.",
"trials."
] |
B
|
arceasy
| null |
arceasy_train_258
|
If two organisms are classified in different orders but are in the same class, which of these statements is true?
|
[
"The organisms have the same genus.",
"The organisms are in the same phylum.",
"The organisms are in different kingdoms.",
"The organisms are members of the same species."
] |
B
|
arceasy
| null |
arceasy_train_259
|
Why do mountain climbers at high elevations use oxygen tanks to help them breathe?
|
[
"At high elevations the ozone layer draws oxygen out of the atmosphere.",
"The atmosphere is less dense at higher elevations so there is less oxygen available.",
"Oxygen is heavier than the other gases in the atmosphere and sinks to lower elevations.",
"Radiation from the Sun splits oxygen molecules into atoms making the oxygen unbreathable."
] |
B
|
arceasy
| null |
arceasy_train_260
|
The students were told that the net applied force from the engine was the same for each vehicle tested. Based on this information, which vehicle had the greatest acceleration (a = F/m)?
|
[
"vehicle 1",
"vehicle 2",
"vehicle 3",
"vehicle 4"
] |
A
|
arceasy
| null |
arceasy_train_261
|
Which metric unit is used to describe an object's length?
|
[
"gram (g)",
"milliliter (mL)",
"centimeter (cm)",
"degree Celsius (°C)"
] |
C
|
arceasy
| null |
arceasy_train_262
|
Which is a process that occurs during photosynthesis?
|
[
"Plants take in oxygen and release sugar.",
"Plants take in sugar and release minerals.",
"Plants take in minerals and release carbon dioxide.",
"Plants take in carbon dioxide and release oxygen."
] |
D
|
arceasy
| null |
arceasy_train_263
|
The work of which scientist serves as the basis for many procedures used in agriculture, such as selective breeding of plants?
|
[
"Darwin",
"Mendel",
"Einstein",
"Pasteur"
] |
B
|
arceasy
| null |
arceasy_train_264
|
A student is investigating which type of soil is best for growing tomato plants from seeds. The student plants four tomato seeds in each of three different containers of soil. Which step of the procedure would help the student get the most reliable results?
|
[
"Place one container in a dark room.",
"Use different types of tomato seeds.",
"Change only the soil type in each container.",
"Water each container with a different amount of water."
] |
C
|
arceasy
| null |
arceasy_train_265
|
In many caves, rock formations include stalactites and stalagmites. Where does the rock in these formations come from?
|
[
"magma",
"rainwater",
"dissolved minerals",
"decaying organic matter"
] |
C
|
arceasy
| null |
arceasy_train_266
|
A person named Leonardo da Vinci studied many things including animals, geology, clouds, and flight. His study of birds helped him design the first parachute. Everything he saw made him ask how and why. Which human quality most likely made this person want to study many different things?
|
[
"duty",
"wisdom",
"kindness",
"curiosity"
] |
D
|
arceasy
| null |
arceasy_train_267
|
What is the main reason we can see the Moon?
|
[
"The Moon reflects light from the Earth.",
"The Moon reflects the light from the Sun.",
"The Moon produces its own light.",
"The Moon is larger than stars."
] |
B
|
arceasy
| null |
arceasy_train_268
|
Which of these events have the most influence on regional climate?
|
[
"frequent tornadoes",
"ocean trade winds",
"winter snowstorms",
"temperature inversions"
] |
B
|
arceasy
| null |
arceasy_train_269
|
If a scientist wants the medical community to revise old information and use new research findings in the treatment of a disease, it would be best to present the information
|
[
"at a school science fair.",
"in a newspaper article.",
"at a physicians' conference.",
"in a television commercial."
] |
C
|
arceasy
| null |
arceasy_train_270
|
David planted ten corn seeds in sandy soil and ten corn seeds in clay soil. He kept both groups of plants at room temperature, gave them the same amount of water, and placed them all in the same sunny room. Which of the following questions is David most able to answer with his experiment?
|
[
"How much soil and water do corn seeds need to grow?",
"Do corn plants grow better in sandy soil or in clay soil?",
"Do corn plants grown in sandy soil need more water than corn plants grown in clay soil?",
"What are the effects of soil, temperature, water, and sunshine on the growth of corn plants?"
] |
B
|
arceasy
| null |
arceasy_train_271
|
Which geologic feature most likely forms when an oceanic tectonic plate is slowly subducted beneath a continental tectonic plate?
|
[
"ocean trench",
"mid-ocean ridge",
"continental hot spot",
"continental rift valley"
] |
A
|
arceasy
| null |
arceasy_train_272
|
A glacier retreats leaving bare rocks. Lichens begin to live on the rocks. The lichens produce an acid that starts to break down the rocks. How will this process affect the environment?
|
[
"It will put acid into the lakes and ponds.",
"It will begin the process of building soil.",
"It will prevent the carbon cycle from occurring.",
"It will prevent bacteria from invading the ecosystem."
] |
B
|
arceasy
| null |
arceasy_train_273
|
During protein synthesis, mRNA is translated into three-base sequences representing amino acids. What signals the ribosome to begin translating the mRNA into a new amino acid sequence?
|
[
"a codon",
"enzymes",
"a mutation",
"temperature"
] |
A
|
arceasy
| null |
arceasy_train_274
|
Phobos is one of two large objects that orbit the planet Mars. Because Phobos orbits Mars, Phobos should be classified as which type of body?
|
[
"asteroid",
"moon",
"comet",
"meteor"
] |
B
|
arceasy
| null |
arceasy_train_276
|
Which rapid changes are caused by heat from inside Earth?
|
[
"landslides",
"volcanoes",
"avalanches",
"floods"
] |
B
|
arceasy
| null |
arceasy_train_277
|
Which tool is most responsible for preventing future pandemics of smallpox?
|
[
"worldwide vaccination for smallpox",
"global education about smallpox",
"better worldwide urban sanitation",
"improved global quarantine facilities"
] |
A
|
arceasy
| null |
arceasy_train_278
|
After which event will ecological succession most likely happen?
|
[
"a forest fire",
"a thunderstorm",
"a high tide",
"a lunar eclipse"
] |
A
|
arceasy
| null |
arceasy_train_279
|
Sir Isaac Newton determined that white light is made up of all the colors of the rainbow. What did he use to discover this phenomenon?
|
[
"a prism",
"a telescope",
"a microscope",
"a magnifying glass"
] |
A
|
arceasy
| null |
arceasy_train_280
|
Which characteristic is most common among animals living in a cold climate?
|
[
"layers of fat",
"thick bones",
"slow digestion",
"large lungs"
] |
A
|
arceasy
| null |
arceasy_train_281
|
Species are classified based on their characteristics. Which characteristic identifies two organisms as members of one species? The organisms
|
[
"can produce fertile offspring.",
"can communicate easily.",
"will defend their territory.",
"will move from place to place."
] |
A
|
arceasy
| null |
arceasy_train_282
|
A student hypothesizes that the amount of water a plant receives will affect how long it grows before reaching maturity. To test this hypothesis, the student will need
|
[
"several digital scales.",
"a wet paper towel.",
"several identical plant seeds.",
"different sizes of containers."
] |
C
|
arceasy
| null |
arceasy_train_283
|
One example of matter is
|
[
"sound",
"light",
"heat",
"water"
] |
D
|
arceasy
| null |
arceasy_train_284
|
If a classroom experiment involves the use of several unidentified chemical solutions, which factor would be most important in maintaining safety during the experiment?
|
[
"The classroom would be fairly cold.",
"The classroom would have poor lighting.",
"The classroom would have good ventilation.",
"The classroom would have carpet on the floors."
] |
C
|
arceasy
| null |
arceasy_train_285
|
Vein deposits of gold and silver are often formed in areas that have experienced which geologic process?
|
[
"igneous intrusion",
"transport by water",
"chemical weathering",
"compaction by pressure"
] |
A
|
arceasy
| null |
arceasy_train_286
|
Cells that conduct messages are known as
|
[
"skin cells",
"nerve cells",
"blood cells",
"kidney cells"
] |
B
|
arceasy
| null |
arceasy_train_287
|
The boiling of water results in a physical change in matter from
|
[
"solid to liquid.",
"gas to solid.",
"solid to gas.",
"liquid to gas."
] |
D
|
arceasy
| null |
arceasy_train_288
|
What do playing a guitar, banging a drum, and dropping a pebble in the water have in common?
|
[
"They all produce light.",
"They all cause vibrations.",
"They all convert heat to energy.",
"They all need gravity to move."
] |
B
|
arceasy
| null |
arceasy_train_290
|
At room temperature, what state of matter is copper?
|
[
"gas",
"solid",
"liquid",
"plasma"
] |
B
|
arceasy
| null |
arceasy_train_291
|
All of the following events occur during prophase in mitosis except
|
[
"pairing of chromosomes.",
"spindle formation.",
"crossing over.",
"condensation of DNA."
] |
C
|
arceasy
| null |
arceasy_train_292
|
A seed of a plant sticks to the fur of an animal as it walks by. How has the animal most likely helped the plant?
|
[
"by spreading the seed",
"by sprouting the plant",
"by scattering the pollen",
"by fertilizing the ground"
] |
A
|
arceasy
| null |
arceasy_train_293
|
Which part of a plant is used to absorb sunlight during photosynthesis?
|
[
"leaf",
"root",
"seed",
"flower"
] |
A
|
arceasy
| null |
arceasy_train_294
|
You wish to closely observe a small insect. Which tool is the best to use?
|
[
"a balance",
"a test tube",
"a telescope",
"a magnifying glass"
] |
D
|
arceasy
| null |
arceasy_train_296
|
A student flips a coin four times. It lands "heads" up three times. The student concludes that the coin will land "heads" up three times out of four. What will make the conclusion more accurate?
|
[
"substituting a different coin",
"flipping the coin twenty more times",
"taping a weight to one side of the coin",
"flipping the coin over a smoother surface"
] |
B
|
arceasy
| null |
arceasy_train_297
|
Which mineral has six-sided transparent crystals that will scratch glass?
|
[
"sulfur",
"quartz",
"calcite",
"feldspar"
] |
B
|
arceasy
| null |
arceasy_train_298
|
Which best describes a proton?
|
[
"negatively charged and has a negligible mass",
"negatively charged and part of the nucleus",
"positively charged and part of the nucleus",
"negatively charged and orbits the nucleus"
] |
C
|
arceasy
| null |
arceasy_train_299
|
The difference between the atomic number of an element and the element's atomic mass is the number of
|
[
"ions.",
"protons.",
"electrons.",
"neutrons."
] |
D
|
arceasy
| null |
arceasy_train_300
|
Which step will most likely ensure that the results of an investigation are valid?
|
[
"using a computer to graph results",
"verifying that results match the original hypothesis",
"comparing the results with those of other scientists",
"eliminating any results that appear to be abnormal"
] |
C
|
arceasy
| null |
arceasy_train_301
|
What is formed when a sodium atom and chlorine atom react chemically?
|
[
"an element",
"a compound",
"an electron",
"a neutron"
] |
B
|
arceasy
| null |
arceasy_train_302
|
Which of these is an example of an endothermic process?
|
[
"fireworks display",
"glowing light stick",
"first-aid instant cold pack",
"gasoline-burning car engine"
] |
C
|
arceasy
| null |
arceasy_train_303
|
The distance from Earth to the Sun is about 150,000,000 km. What abbreviation do scientists use to describe this distance?
|
[
"meters per second (m/s)",
"light-year (ly)",
"astronomical unit (AU)",
"electromagnetic unit (EMU)"
] |
C
|
arceasy
| null |
arceasy_train_304
|
In New York State, the longest period of daylight occurs during which month?
|
[
"June",
"March",
"December",
"September"
] |
A
|
arceasy
| null |
arceasy_train_305
|
Which trait does a puppy inherit from its parents?
|
[
"fur color and pattern",
"obedience to commands",
"food brand preferences",
"affection for a specific home"
] |
A
|
arceasy
| null |
arceasy_train_306
|
Which material is most easily recycled at school?
|
[
"plastic wrap",
"notebook paper",
"ice cream sticks",
"rubber erasers"
] |
B
|
arceasy
| null |
arceasy_train_307
|
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?
|
[
"glucose molecule",
"carbon dioxide",
"single carbon atoms",
"complex organic compounds"
] |
B
|
arceasy
| null |
arceasy_train_308
|
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?
|
[
"Daylight brightens the sun, making it appear larger.",
"Starlight bends as it passes planets, making the stars appear smaller.",
"The sun is closer to Earth than other stars, making the sun appear larger.",
"Earth's atmosphere filters out light from other stars, making them appear smaller."
] |
C
|
arceasy
| null |
arceasy_train_309
|
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
|
[
"chemical reaction",
"Condensation",
"A physical change",
"Evaporation"
] |
A
|
arceasy
| null |
arceasy_train_310
|
John has diabetes. Which of the following should he be careful about eating or drinking?
|
[
"beef",
"eggs",
"milk",
"fruit juice"
] |
D
|
arceasy
| null |
arceasy_train_311
|
Within a substance, atoms that collide frequently and move independently of one another are most likely in a
|
[
"liquid.",
"solid.",
"gas.",
"crystal."
] |
C
|
arceasy
| null |
arceasy_train_312
|
Which object best reflects light?
|
[
"gray door",
"white floor",
"black sweater",
"brown carpet"
] |
B
|
arceasy
| null |
arceasy_train_313
|
The gravitational attraction of the Moon causes which effect on Earth?
|
[
"ocean tides",
"time of day",
"energy from the Sun",
"phases of the Moon"
] |
A
|
arceasy
| null |
arceasy_train_314
|
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?
|
[
"The clearing allowed mosses to grow quickly.",
"Rock weathering occurred for lichens to grow.",
"Exposed substrates allowed microbes to grow.",
"The soil components remained for plants to grow."
] |
D
|
arceasy
| null |
arceasy_train_315
|
Which object is made to reflect light?
|
[
"telescope",
"window",
"mirror",
"eyeglasses"
] |
C
|
arceasy
| null |
arceasy_train_316
|
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?
|
[
"The car changes speed.",
"The car engine gets hot.",
"The car stops quickly.",
"The car slides on slippery streets."
] |
B
|
arceasy
| null |
arceasy_train_317
|
After nitrogen becomes part of the lithosphere, what is the next change that nitrogen will undergo?
|
[
"used as a nutrient by plants",
"fixed by bacteria in the soil",
"converted into oxygen",
"absorbed into the atmosphere by lightning"
] |
B
|
arceasy
| null |
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