Water Review

31 Questions | Total Attempts: 3893

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Water Review

In this review designated for 8th grade science students, your knowledge on the topic of water will be put to the test. What do you know about saltwater, droplets, condensation, algae and benthos - among other topics? Find out today!


Questions and Answers
  • 1. 
    Water that is stored in the spaces between rocks and dirt is called ________.
    • A. 

      Rain water

    • B. 

      Precipitation

    • C. 

      Spring

    • D. 

      Groundwater

  • 2. 
    This water strider is able to walk on water because of what property of water? This property is also why doing this hurts!
    • A. 

      Buoyancy

    • B. 

      Adhesion

    • C. 

      Cohesion

    • D. 

      Surface tension

  • 3. 
    Water sticking to water is called ________.
    • A. 

      Cohesion

    • B. 

      Adhesion

    • C. 

      Specific heat

    • D. 

      Density

  • 4. 
    Water percentage of water on Earth is saltwater?
    • A. 

      3

    • B. 

      97

    • C. 

      25

    • D. 

      50

  • 5. 
    Water forms droplets. What property of water does this demonstrate?
    • A. 

      Cohesion

    • B. 

      Precipitation

    • C. 

      Adhesion

    • D. 

      Surface tension

  • 6. 
    Water in the form of gas is called?
    • A. 

      Condensation

    • B. 

      Evaporation

    • C. 

      Water vapor

    • D. 

      Ice

  • 7. 
    Which ocean zone is always covered by water, is shallow enough for photosynthesis to take place, and can contain kelp forests?
    • A. 

      Open ocean

    • B. 

      Intertidal zone

    • C. 

      Nertic zone

    • D. 

      Coast

  • 8. 
    • A. 

      Nertic zone

    • B. 

      Open ocean

    • C. 

      Intertidal zone

    • D. 

      Sea-floor

  • 9. 
    Where is most of Earth's freshwater located?
    • A. 

      In polar ice caps

    • B. 

      In lakes and rivers

    • C. 

      As groundwater

    • D. 

      In the oceans

  • 10. 
    Which of the following is an example of a benthos.
    • A. 

      A shark

    • B. 

      Algae

    • C. 

      A crab

    • D. 

      A clownfish

  • 11. 
    Algae is an example of an _______.
    • A. 

      Benthos

    • B. 

      Free swimmer

    • C. 

      Bottom dweller

    • D. 

      Plankton

  • 12. 
    Which type of irrigation pours water through canals and waterways?
    • A. 

      Flood irrigation

    • B. 

      Spray irrigation

    • C. 

      Drip irrigation

    • D. 

      Reservoir irrigation

  • 13. 
    A channel dug to allow boats to travel from one river to another is an example of a
    • A. 

      Canal

    • B. 

      Lake

    • C. 

      Reservoir

    • D. 

      Sewage system

  • 14. 
    In a sewage system, what is added to kill harmful bacteria?
    • A. 

      Chlorine

    • B. 

      Sand

    • C. 

      Bacteria

    • D. 

      Soap

  • 15. 
    The term for pollution that can be traced to a specific location is
    • A. 

      Water pollution

    • B. 

      Point-source pollution

    • C. 

      Nonpoint-source pollution

    • D. 

      Runoff polluition

  • 16. 
    A section of a waterway in which ships are raised or lowered is called a
    • A. 

      Turbine

    • B. 

      Fish ladder

    • C. 

      Dam

    • D. 

      Lock

  • 17. 
    In a sewage plant, sludge and oil are consumed by
    • A. 

      Chlorine

    • B. 

      Sand

    • C. 

      Bacteria

    • D. 

      Soap

  • 18. 
    What are the three forms of water on Earth?
    • A. 

      Groundwater, lakes, and clouds

    • B. 

      Liquid water, frozen water, and water vapor

    • C. 

      Gas, steam, and vapor

    • D. 

      Groundwater, oceans, and ice

  • 19. 
    How is water stored in an aquifer?
    • A. 

      In an open underground lake

    • B. 

      In cracks and spaces in rocks

    • C. 

      In impermeable rock

    • D. 

      In wells and springs

  • 20. 
    Warm water stays at the oceans surface because
    • A. 

      It is less dense than cold water

    • B. 

      It is more dense than cold water

    • C. 

      Is saltier that cold water

    • D. 

      It has more carbon dioxide than cold watert

  • 21. 
    Sonar measures ocean depth by means of
    • A. 

      Sound waves

    • B. 

      Weighted lines

    • C. 

      Magnets

    • D. 

      Light waves

  • 22. 
    Surface currents are caused by
    • A. 

      Waves

    • B. 

      Winds

    • C. 

      Density

    • D. 

      Heat

  • 23. 
    Deep currents are caused by differences in
    • A. 

      Location

    • B. 

      Wind speed

    • C. 

      Depth

    • D. 

      Density

  • 24. 
    Tides are caused by the gravitational pull of
    • A. 

      Earth and the Sun

    • B. 

      The Sun and the Moon

    • C. 

      Earth alone

    • D. 

      Earth and the Moon

  • 25. 
    An environment that contains all the necessary requirements for an organism to live is called
    • A. 

      The surface zone

    • B. 

      A nodule

    • C. 

      A habitat

    • D. 

      An estuary

  • 26. 
    Two kinds of wetlands that border estuaries are
    • A. 

      Coral reefs and mangrove forests

    • B. 

      Salt marshes and mangrove forests

    • C. 

      Tidal pools and salt marshes

    • D. 

      Mangrove forests and tidal pools

  • 27. 
    Where would you expect to find ocean organisms that are able to survive out of water and withstand drastic changes in salinity?
    • A. 

      An intertidal zone

    • B. 

      A coral reef

    • C. 

      The open ocean

    • D. 

      A hydrothermal vent

  • 28. 
    Where are hydrothermal vents located?
    • A. 

      In the intertidal zone

    • B. 

      On the deep-ocean floor

    • C. 

      On coral reefs

    • D. 

      In kelp forest

  • 29. 
    The bacteria that form the base of the food chain at hydrothermal vents convert
    • A. 

      Dim sunlight that filters down into the food

    • B. 

      Heat from the vents into food

    • C. 

      Phytoplankton that drift down into food

    • D. 

      Chemicals released by the vents into food

  • 30. 
    Overfishing is best described as catching
    • A. 

      More fish than people can eat

    • B. 

      Fish at a faster rate than they can reproduce

    • C. 

      Other kinds of fish than the ones intended

    • D. 

      Fish with huge nets and long lines of hooks

  • 31. 
    Why are 30 percent of the fish that are caught by commercial fishing boats thrown away?
    • A. 

      Fishing nets catch everything in their path

    • B. 

      Smaller fish are thrown back into the ocean

    • C. 

      Oil pollution has damaged many of the fish

    • D. 

      Large phytoplankton interfere with nets and lines