Emily Nature World

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Across
  1. 2. permanent frozen layers of Earth
  2. 7. earth replaces naturally
  3. 10. materials in nature that people use and value
  4. 11. nonrenewable; formed from remains of plants and anmimals
  5. 13. average weather conditions over a long period of time
  6. 16. tall made of rock, snow at top
Down
  1. 1. group of plants and animals that depend on each other
  2. 3. short term changes in the air
  3. 4. spread of desert conditions
  4. 5. decayed plant or animal matter
  5. 6. climate type that is very dry and hot
  6. 8. seasonal winds; bring dry or moist air
  7. 9. place where plants or animals live
  8. 12. air masses with different temperatures meet
  9. 14. to die out
  10. 15. effect of environmental change