Practice GED Pre-test Science

25 Questions | Total Attempts: 95

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Practice GED Pre-test Science - Quiz

The purpose of this pre-test is to help you determine which skills you need to develop to pass the GED Science Test.


Questions and Answers
  • 1. 
    A food chain is a group or organisms related to each other in their feeding habits. One organism is eaten by a second one, which in turn is fed upon by a third one. The food chain starts with energy from the Sun. As each organism grows and is eaten, only about 10 percent of the Sun's energy is transferred at each step. People who live in areas of the world where food is scarce eat very little meat and depend on grains and other plants. Based on the ideas presented, which of the following statements best supports such eating habits?
    • A. 

      Plants store energy in sugar molecules.

    • B. 

      Plants taste better than meat from animals.

    • C. 

      More than 90 percent of the energy in plants never reaches people who eat the animals raised on the plants.

    • D. 

      Plants take up less space than grazing animals.

    • E. 

      It is easier to grow plants than raise animals.

  • 2. 
    • A. 

      Compresses and cools.

    • B. 

      Expands and warms.

    • C. 

      Expands and cools.

    • D. 

      Compresses and warms.

    • E. 

      Condenses and lowers in pressure.

  • 3. 
    • A. 

      The drop will pass through the oil and water and mix with the corn-syrup layer.

    • B. 

      The drop will be trapped between the water and oil layers.

    • C. 

      The drop will be trapped in the water level.

    • D. 

      The drop of corn syrup will float on the top layer.

    • E. 

      The drop will mix with the oil layer.

  • 4. 
    • A. 

      Some snakes that appear ferocious are actually quite harmless.

    • B. 

      Some types of nonpoisonous snakes very closely resemble poisonous ones.

    • C. 

      Most snakes feed on rats and mice.

    • D. 

      Snakes are dangerous.

    • E. 

      Snakes feed very infrequently.

  • 5. 
    • A. 

      10:30 p.m.

    • B. 

      10:38 p.m.

    • C. 

      11:04 p.m.

    • D. 

      10:12 p.m.

    • E. 

      None of these

  • 6. 
    Which of the following describes the shoulder joint?
    • A. 

      Pivot joint

    • B. 

      Saddle joint

    • C. 

      Ball and socket joint

    • D. 

      Hinge joint

    • E. 

      None of these

  • 7. 
    • A. 

      Clay soil would form a good liner if a person built a pond.

    • B. 

      Sandy soil would make a good lining for a toxic waste site.

    • C. 

      Clay soil would be a good foundation for a large building.

    • D. 

      Clay soil would work well in a drain field.

    • E. 

      A sandy lake bottom would prevent water from seeping out of the lake.

  • 8. 
    Medical laboratories often need to separate blood into its three main parts.  Blood is made primarily of red blood cells, white blood cells, and a liquid called plasma.  This separation can be easily done because each part has a different density.   The diagram shows blood added to a test tube containing a medium called Ficoll-Hypaque, as shown in tube A.  After tube A is processed, the blood separates into the three parts shown in tube B.   Which of the following statements about the densities of the three parts is correct? 
    • A. 

      White blood cells are more dense than red blood cells.

    • B. 

      Red blood cells are denser than either white blood cells or plasma.

    • C. 

      Red cells are less dense than whole blood.

    • D. 

      Plasma is the densest component.

    • E. 

      All blood cells are equally dense.

  • 9. 
    Use the following passage to answer questions 9 and 10. According to the passage, which of the following statements are true:
    • A. 

      High blood pressure is an effect of light pollution.

    • B. 

      Light pollution can cause hearing problems in humans and animals.

    • C. 

      Animals have trouble navigating because of medical waste companies.

    • D. 

      Vehicle and aircraft pollution is caused by radioactive pollutants.

    • E. 

      Whales have been known to beach themselves because the global warming has caused some glacier to melt.

  • 10. 
    According to the passage, which type of pollution(s) can a car cause?
    • A. 

      Air pollution

    • B. 

      Noise pollution

    • C. 

      Light pollution

    • D. 

      Both A and B

    • E. 

      All of the above

  • 11. 
    The graph below shows temperature changes as a result of heating ice.  Study the diagram, then answer question that follows.
    • A. 

      The liquid is freezing.

    • B. 

      The liquid is evaporating.

    • C. 

      The solid is melting.

    • D. 

      The solid is freezing.

    • E. 

      Nothing is happening because ice cannot be heated.

  • 12. 
    Fossils similar to marine life found in the oceans today, have been found in rocks on top of mountains.  This can be explained by:
    • A. 

      The rocks which contain the fossils were once under the ocean.

    • B. 

      Marine organisms were once able to breathe air.

    • C. 

      Weather has moved the fossils from the oceans to the mountains.

    • D. 

      The marine life can live on land or in the ocean.

    • E. 

      None of the above

  • 13. 
    Which of the following BEST explains why a concrete floor feels colder than a wooden floor if both are at 21ºC:
    • A. 

      Wood is alive and concrete is not

    • B. 

      Concrete is much less elastic than wood

    • C. 

      Concrete conducts heat better than wood

    • D. 

      Wood is not as dense as concrete

    • E. 

      None of these

  • 14. 
    Use the diagram below to determine the products of photosynthesis of plant cells.  The diagram shows the relationship between photosynthesis and respiration. 
    • A. 

      Oxygen and energy

    • B. 

      Glucose and oxygen

    • C. 

      Carbon dioxide and glucose

    • D. 

      Carbon dioxide and water

    • E. 

      None of the above

  • 15. 
    According to the table above, what could be concluded about the general relationship between a planet's distance from the sun and its temperature?
    • A. 

      The temperature on Neptune is the coldest.

    • B. 

      Neptune is the farthest planet from the sun.

    • C. 

      The average temperature on Venus is higher than that of Mercury because Venus is closer to the sun.

    • D. 

      The closer the planet is to the sun, the colder it is on the planet.

    • E. 

      The further the planet is from the sun, the colder it is on the planet.

  • 16. 
    • A. 

      How does the pitch change when a bell is moving?

    • B. 

      Through what material does sound travel best?

    • C. 

      How much faster does light travel than sound?

    • D. 

      What is the best material to use in musical instruments?

    • E. 

      How does the pitch of an instrument change when it's held underwater?

  • 17. 
    Use the passage below to answer questions 17 and 18. According to the passage, symptoms such as nausea and dizziness in a heat exhaustion victim indicates that the person most likely needs to ____________________.
    • A. 

      Go immediately to the hospital

    • B. 

      Be immersed in a tub of cold water

    • C. 

      Sponged with cool water

    • D. 

      Be given more salt water

    • E. 

      Sweat more

  • 18. 
    According to the passage, which statement below is true?
    • A. 

      Heat stroke is more serious than heat exhaustion because heat stroke victims do not sweat.

    • B. 

      Heat stroke is more serious than heat exhaustion because heat stroke victims cannot take in water.

    • C. 

      Heat exhaustion is more serious than heat stroke.

    • D. 

      When large amounts of water and salt are lost through excessive sweating a person always has a heat stroke.

    • E. 

      None of the above are true

  • 19. 
    • A. 

      The planning stage of any DTP project should include talking with the intended audience.

    • B. 

      Computer software is continually being refined to produce high-quality printing.

    • C. 

      Desktop Publishing is one way to become acquainted with a new business audience.

    • D. 

      The first stage of any proposed DTP project should be organization and design.

  • 20. 
    This experiment was probably set up to determine ___________________.
    • A. 

      How much energy is converted into heat

    • B. 

      The pressure caused by an electric current

    • C. 

      The pH of water during electrolysis

    • D. 

      How much mechanical energy the battery produces

  • 21. 
    Which of the following processes shows an example of solar energy converting to chemical energy?
    • A. 

      Green plants making their own food

    • B. 

      Ocean tides generating electricity

    • C. 

      Prevailing winds causing windmills to spin

    • D. 

      Uranium producing heat to make steam

    • E. 

      None of the above

  • 22. 
    The smell of an ammonia solution used to clean a floor can quickly be detected throughout a house.  Scientists explain this by theorizing that the gas molecules from the ammonia are in continuous high-speed motion, drifting rapidly and permeating the air.  Which statement best demonstrates the strength of this theory?
    • A. 

      Reason, as opposed to experimentation, is superior to any explanation found through chemical testing.

    • B. 

      Scientists have unanimously agreed on this theory since Thomas Graham's experiments in the 1820s.

    • C. 

      Scientists have observed tiny smoke particles moved by unseen particles in a rapid, irregular fashion.

    • D. 

      The possibility of another theory being formed to explain the phenomenon as well is very remote.

    • E. 

      None of the above

  • 23. 
    • A. 

      The amount of energy recycled by the organisms at each level

    • B. 

      The amount of heat given off daily by the organisms at each level

    • C. 

      The amount of energy used daily by the organisms at each level

    • D. 

      The amount of energy available in the organisms at each level

    • E. 

      None of the above

  • 24. 
    • A. 

      The birth rate of the eagles increased.

    • B. 

      The death rate of the eagles exceeded the birth rate.

    • C. 

      The emigration rate of the eagles decreased.

    • D. 

      The specific area reached its carrying capacity for the eagle population.

    • E. 

      None of the above

  • 25. 
    Water covers approximately what percentage of the earth's surface?
    • A. 

      25 percent

    • B. 

      55 percent

    • C. 

      70 percent

    • D. 

      90 percent

    • E. 

      None of these

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