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How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
How do ecosystems change
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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

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