History

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Across
  1. 2. long-period waves are called?
  2. 3. After you eat, you throw your food in the?
  3. 4. A tropical storm with strong winds is called?
  4. 5. You burn fossils to make what?
  5. 7. When you use the toilet, it's human?
  6. 9. Water falling from the sky is called what?
  7. 10. Natural fires are called?
  8. 12. A long-term shift in temperatures and weather patterns is called?
  9. 14. The process of removing trees is called?
Down
  1. 1. The smoke that comes out of factories is called what?
  2. 3. A car is a form of this
  3. 6. When chemicals are put in the air or water it's called what?
  4. 8. You need these buildings to make stuff
  5. 11. A barrier constructed to hold back water is called?
  6. 13. When the pesticides for farming wash away with the rain, it's called what