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arc_easy
arc_easy
Question: A baby kit fox grows to become an adult with a mass of over 3.5 kg. What factor will have the greatest influence on this kit fox's survival? Answer:
the conditions of the fox's habitat
train
arc_easy
arc_easy
Question: Hydrochloric acid is added to a beaker containing a piece of zinc. As a result, zinc chloride is formed and hydrogen gas is released. This is an example of Answer:
a chemical reaction
validation
arc_easy
arc_easy
Question: Which part of a plant produces the seeds? Answer:
flower
train
arc_easy
arc_easy
Question: Which of the following is found in all living organisms? Answer:
cell
train
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arc_easy
Question: What is the role of decomposers in a food chain? Answer:
They break down dead organic matter.
train
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arc_easy
Question: Copernicus changed the way people viewed the solar system by Answer:
claiming Earth is in orbit about the Sun.
train
arc_easy
arc_easy
Question: Which part of the electromagnetic spectrum can humans sense without using equipment or technology? Answer:
visible light
train
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arc_easy
Question: The nervous system is composed of cells, tissues, and organs. Which is a cell of the nervous system? Answer:
neuron
validation
arc_easy
arc_easy
Question: A shallow container of salt water is placed in sunlight for a day. Which is the most likely result? Answer:
Only the water will evaporate and the salt will remain in the container.
train
arc_easy
arc_easy
Question: Which of these will best separate a saltwater solution? Answer:
allowing the water to evaporate
validation
arc_easy
arc_easy
Question: Mrs. Henderson's class has five small, covered boxes. One contains perfume; another contains dried onions. There is also a box of pine needles, a box of lemon pieces, and a box with a paper towel wet with vanilla flavoring. Which should they do to get the best information about what is in each box? Answer:
Smell the boxes.
train
arc_easy
arc_easy
Question: Which features are physical properties of an iron nail? Answer:
conducts heat, magnetic, solid
train
arc_easy
arc_easy
Question: Which item would a magnet attract? Answer:
iron nail
train
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arc_easy
Question: Which human activity is most harmful to the natural environment? Answer:
cutting down a rain forest
train
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arc_easy
Question: The process of digestion breaks down proteins into smaller molecules that are used to rebuild other proteins. During digestion, proteins undergo Answer:
chemical changes.
train
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arc_easy
Question: Blood is composed of different cell types that transport nutrients and wastes throughout the body. Because of this, blood is classified as Answer:
a tissue.
validation
arc_easy
arc_easy
Question: What should a student do when a glass beaker shatters during a laboratory experiment? Answer:
Notify the teacher.
train
arc_easy
arc_easy
Question: An astronomical unit (AU) refers to the distance between Answer:
Earth and the Sun.
train
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arc_easy
Question: 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? Answer:
128 Hz
validation
arc_easy
arc_easy
Question: Which of the following allows the planets to stay in orbit? Answer:
the Sun's gravity
train
arc_easy
arc_easy
Question: Which of these involves the formation of a new chemical substance? Answer:
rusting of an iron chain
train
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arc_easy
Question: Water causes weathering when it Answer:
erodes rock in its path.
train
arc_easy
arc_easy
Question: Which of these statements about nonrenewable resources is true? Answer:
They can take millions of years to form.
train
arc_easy
arc_easy
Question: Which statement best identifies a living thing that depends on another living thing to survive? Answer:
A moose eats a plant.
train
arc_easy
arc_easy
Question: 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 Answer:
energy.
train
arc_easy
arc_easy
Question: 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? Answer:
a fault
validation
arc_easy
arc_easy
Question: The pull of gravity on Earth is caused by Answer:
the mass of Earth.
train
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arc_easy
Question: In which type of rock are fossils generally found? Answer:
sedimentary
train
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arc_easy
Question: 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 Answer:
history and processes of Earth.
train
arc_easy
arc_easy
Question: A simple machine that helps move a flag up a flagpole is Answer:
a pulley
train
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arc_easy
Question: Which cellular structure allows nutrients to pass into cells? Answer:
membrane
train
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arc_easy
Question: An example of a renewable resource is Answer:
wood.
train
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arc_easy
Question: Minerals are formed by which process? Answer:
magma cooling
train
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arc_easy
Question: Which of these best defines the term "pollutant"? Answer:
any substance that is harmful to the environment
validation
arc_easy
arc_easy
Question: The periodic table of the elements is systematically organized according to the Answer:
structure of the atoms of the elements.
train
arc_easy
arc_easy
Question: Which human body system produces the hormones that regulate growth? Answer:
endocrine
train
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arc_easy
Question: Repeated exposure to extremely loud sounds can reduce hearing ability by direct damage to which structures? Answer:
the sensory neurons in the ears
train
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arc_easy
Question: What does a mirror do to light that causes objects to appear backwards? Answer:
reflects
train
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arc_easy
Question: The formation of the mineral halite is most likely to occur by which process? Answer:
the evaporation of seawater
validation
arc_easy
arc_easy
Question: A student wants to design an experiment regarding the behavior of crickets. Which is the best question to ask to begin the experiment? Answer:
Do crickets chirp more during the day or at night?
train
arc_easy
arc_easy
Question: Decomposers are organisms that eat and break down dead plant and animal material. Which organism is a decomposer? Answer:
bacteria
train
arc_easy
arc_easy
Question: 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 ___. Answer:
melt
train
arc_easy
arc_easy
Question: New vaccines for diseases are being developed all the time. How do vaccines most likely help people? Answer:
Vaccines help prevent illnesses.
train
arc_easy
arc_easy
Question: The cell cycle describes the processes that take place as a cell Answer:
forms new cells.
train
arc_easy
arc_easy
Question: 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? Answer:
The new material can save money on replacements.
train
arc_easy
arc_easy
Question: Which best explains how the Appalachian Mountains formed? Answer:
tectonic plates collided
train
arc_easy
arc_easy
Question: Which is a source of sound? Answer:
a vibration
train
arc_easy
arc_easy
Question: Which natural material is best for making a table? Answer:
wood that is sturdy
train
arc_easy
arc_easy
Question: A class is studying textures and collects several samples. Which of these items would the students most likely use magnification to study? Answer:
hair
train
arc_easy
arc_easy
Question: 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? Answer:
genetic mutation
validation
arc_easy
arc_easy
Question: What type of precipitation occurs when raindrops freeze as they fall? Answer:
sleet
train
arc_easy
arc_easy
Question: In the atomic model that includes a nucleus, the positive charge is Answer:
concentrated in the center of the model.
train
arc_easy
arc_easy
Question: 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 Answer:
magnetic field produced by the electric current.
train
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arc_easy
Question: The production of sweat is typically a response to an increase in the body's Answer:
temperature.
train
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arc_easy
Question: Which of the following converts electrical energy into motion? Answer:
electric fan
train
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arc_easy
Question: What happens at the boiling point of a substance? Answer:
liquid becomes a gas
train
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arc_easy
Question: How do producers get energy? Answer:
using the sun to make food
train
arc_easy
arc_easy
Question: 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 Answer:
variables.
train
arc_easy
arc_easy
Question: If two organisms are classified in different orders but are in the same class, which of these statements is true? Answer:
The organisms are in the same phylum.
train
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arc_easy
Question: Why do mountain climbers at high elevations use oxygen tanks to help them breathe? Answer:
The atmosphere is less dense at higher elevations so there is less oxygen available.
train
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arc_easy
Question: 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)? Answer:
vehicle 1
train
arc_easy
arc_easy
Question: Which metric unit is used to describe an object's length? Answer:
centimeter (cm)
train
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arc_easy
Question: Which is a process that occurs during photosynthesis? Answer:
Plants take in carbon dioxide and release oxygen.
train
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arc_easy
Question: The work of which scientist serves as the basis for many procedures used in agriculture, such as selective breeding of plants? Answer:
Mendel
train
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arc_easy
Question: 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? Answer:
Change only the soil type in each container.
train
arc_easy
arc_easy
Question: In many caves, rock formations include stalactites and stalagmites. Where does the rock in these formations come from? Answer:
dissolved minerals
train
arc_easy
arc_easy
Question: 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? Answer:
curiosity
train
arc_easy
arc_easy
Question: What is the main reason we can see the Moon? Answer:
The Moon reflects the light from the Sun.
train
arc_easy
arc_easy
Question: Which of these events have the most influence on regional climate? Answer:
ocean trade winds
train
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arc_easy
Question: 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 Answer:
at a physicians' conference.
validation
arc_easy
arc_easy
Question: 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? Answer:
Do corn plants grow better in sandy soil or in clay soil?
train
arc_easy
arc_easy
Question: Which geologic feature most likely forms when an oceanic tectonic plate is slowly subducted beneath a continental tectonic plate? Answer:
ocean trench
train
arc_easy
arc_easy
Question: 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? Answer:
It will begin the process of building soil.
train
arc_easy
arc_easy
Question: 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? Answer:
a codon
train
arc_easy
arc_easy
Question: 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? Answer:
moon
train
arc_easy
arc_easy
Question: Water at 20°C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly? Answer:
Heat it.
train
arc_easy
arc_easy
Question: Which rapid changes are caused by heat from inside Earth? Answer:
volcanoes
train
arc_easy
arc_easy
Question: Which tool is most responsible for preventing future pandemics of smallpox? Answer:
worldwide vaccination for smallpox
train
arc_easy
arc_easy
Question: After which event will ecological succession most likely happen? Answer:
a forest fire
train
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arc_easy
Question: 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? Answer:
a prism
train
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arc_easy
Question: Which characteristic is most common among animals living in a cold climate? Answer:
layers of fat
train
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arc_easy
Question: Species are classified based on their characteristics. Which characteristic identifies two organisms as members of one species? The organisms Answer:
can produce fertile offspring.
train
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arc_easy
Question: 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 Answer:
several identical plant seeds.
train
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arc_easy
Question: One example of matter is Answer:
water
train
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arc_easy
Question: If a classroom experiment involves the use of several unidentified chemical solutions, which factor would be most important in maintaining safety during the experiment? Answer:
The classroom would have good ventilation.
train
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arc_easy
Question: Vein deposits of gold and silver are often formed in areas that have experienced which geologic process? Answer:
igneous intrusion
train
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arc_easy
Question: Cells that conduct messages are known as Answer:
nerve cells
train
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arc_easy
Question: The boiling of water results in a physical change in matter from Answer:
liquid to gas.
train
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arc_easy
Question: What do playing a guitar, banging a drum, and dropping a pebble in the water have in common? Answer:
They all cause vibrations.
train
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arc_easy
Question: Which object below is gaining stored energy? Answer:
A rubber band that is being stretched
train
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arc_easy
Question: At room temperature, what state of matter is copper? Answer:
solid
train
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arc_easy
Question: All of the following events occur during prophase in mitosis except Answer:
crossing over.
train
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arc_easy
Question: 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? Answer:
by spreading the seed
train
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arc_easy
Question: Which part of a plant is used to absorb sunlight during photosynthesis? Answer:
leaf
train
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arc_easy
Question: You wish to closely observe a small insect. Which tool is the best to use? Answer:
a magnifying glass
train
arc_easy
arc_easy
Question: The interaction of the skeletal and muscular systems to produce locomotion is coordinated by which human body system? Answer:
nervous
validation
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arc_easy
Question: 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? Answer:
flipping the coin twenty more times
train
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arc_easy
Question: Which mineral has six-sided transparent crystals that will scratch glass? Answer:
quartz
validation
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arc_easy
Question: Which best describes a proton? Answer:
positively charged and part of the nucleus
train
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arc_easy
Question: The difference between the atomic number of an element and the element's atomic mass is the number of Answer:
neutrons.
train