7th Environmental Science Review

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Across
  1. 2. a water ______ is the highest point in an aquifer from which water can be obtained
  2. 3. the positive benefits that an ecosystem provides to people is an ecosystem _______
  3. 4. a hole in the ground formed when water has dissolved underground rock to the point where it can no longer support the land surface
  4. 6. the study of geology that is focused on the distribution and movement of groundwater in the soil and rocks of Earth's crust
  5. 9. the amount of space between particles in a substance
  6. 11. the supply of fresh water found beneath Earth's surface in the pores of soil, sand, and rock
  7. 12. groundwater accounts for about ______ percent of the world's easily accessible fresh water
Down
  1. 1. the ease with which substances such as water move through a material
  2. 2. these can determine when and where sinkholes and other natural disasters might occur
  3. 5. the contamination of natural water bodies by substances that harm organisms and the environment is water ________
  4. 7. the process of separating solid matter from a fluid by having the fluid pass through the pores of another substance
  5. 8. an underground layer of rock, sand, or gravel that holds groundwater
  6. 10. this is constantly breaking rocks down and reforming them