Semester One Exam Review - Unit 2

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Across
  1. 4. Occurs when liquid water changes into water vapor.
  2. 6. Most of the water found on the surface of the Earth is ____ water.
  3. 9. Icebergs float in the ocean because ice is ____ dense than liquid water.
  4. 13. Pollution that occurs when waste matter or other material is introduced into water making it harmful to organisms that live in, drink, or are exposed to water is ____ pollution.
  5. 15. Any form of water that falls to Earth.
  6. 17. The upper boundary, or surface, of groundwater is called the water ______.
  7. 18. The property that holds molecules of different substances together.
  8. 20. The property of water that allows it to form droplets when in liquid form.
  9. 21. The continuous movement of water between the atmosphere, the land, the oceans, and living things is called the ______ cycle.
  10. 22. A measure of the amount of open spaces between the particles of rock and soil.
Down
  1. 1. A body of rock or sediment that stores groundwater and allows it to flow.
  2. 2. Pollution that comes from many small sources and is difficult to control is known as _____ source pollution.
  3. 3. A _____ is the area of land that is drained by a river system.
  4. 5. A smaller stream that feeds into a river and eventually into a river system.
  5. 6. Water is called the universal _____ because it dissolves a large number of substances.
  6. 7. Water is a ____ molecule because its hydrogen atoms have a small positive charge and its oxygen atom has a small negative charge.
  7. 8. A ridge, or area of higher ground that separates one watershed from another.
  8. 10. The materials carried by a stream other than the water itself is the ____ load.
  9. 11. The change of state from a gas to a liquid.
  10. 12. The chain of energy transfers that create surface currents on the ocean is solar energy -> ___ energy -> surface currents.
  11. 14. Any heating of natural water that results from human activity is ____ pollution.
  12. 16. Pollution that comes from a specific site is ____ source pollution.
  13. 19. Precipitation that is more acidic than normal is ____ rain.
  14. 23. Occurs when solid water changes directly to water vapor without first becoming a liquid.