Pollution

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 6. Food that is discarded (7)
  2. 10. The social force that binds you to the courses of action demanded by that force (14)
  3. 11. Condition in which the earth's surface is worn away by the action of water and wind (7)
  4. 13. The natural world around us (11)
  5. 14. The power to use something or someone (8)
  6. 15. State of matter that fills any space, like air (3)
  7. 16. A severe tropical cyclone usually with heavy rains and winds moving at 63-136 knots (9)

Down

  1. 1. A mass of ___ and snow that permanently covers a large area of land (plural) (7)
  2. 2. The state of being clear of trees (13)
  3. 3. Gases ejected from an engine as waste products (7)
  4. 4. An uninhabited wilderness that is worthless for cultivation (5)
  5. 5. An increase in the average temperature of the earth's atmosphere (13)
  6. 7. A colorless gas soluble in alkalis and cold water (5)
  7. 8. A heavy odorless colorless gas formed during respiration and by the decomposition of organic (13)
  8. 9. A technique used in behavior therapy (8)
  9. 12. A shortage of rainfall (7)