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How do ecosystems change
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  • 1. How doecosystems change?Grade 3
  • 2. Waysecosystemschange :
  • 3. Volcanoes
  • 4. Fires
  • 5. Floods
  • 6. ways animalschangeecosystems:
  • 7. 1.locusts1. locusts
  • 8. 2. beavers builddams
  • 9. 3. earthworms dig holesin soil- bring oxygen toplant roots
  • 10. wayspeoplechangeecosystems:
  • 11. 1. build houses
  • 12. 2. clear forests
  • 13. 3. introduce new plants &animals(accidentally or on purpose)
  • 14. 4. throw out garbage
  • 15. 4. Air pollution