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How Living Things
Interact in Ecosystems
Carbon Dioxide – Oxygen Cycle
Animal Plant Interactions
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Carbon Dioxide – Oxygen Cycle
when things interact, they come
into contact with and affect one
another



living

thi...
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Carbon Dioxide – Oxygen Cycle

Plants and Animals depend on
each other to survive


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Carbon Dioxide – Oxygen Cycle
Plants need carbon dioxide to make
their own food



Plants

give off oxygen.

Animals...
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Animal Plant Interactions
In an ecosystem populations of
living things interact to get
resources



Population

– all...
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Animal Plant Interactions
Resource – something that a
living thing needs to stay alive.



examples: food, water, liv...
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Animal Plant Interactions
Animals depend on plants but
plants also depend on animals.



Animals

provide nutrients f...
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Animal Plant Interactions
Changes that affects plants also
affects animals



If

trees in a forest are cut down bird...
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animal plant interactions

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animal plant interactions

  1. 1. + How Living Things Interact in Ecosystems Carbon Dioxide – Oxygen Cycle Animal Plant Interactions
  2. 2. + Carbon Dioxide – Oxygen Cycle when things interact, they come into contact with and affect one another  living things interact with nonliving things in their environment
  3. 3. + Carbon Dioxide – Oxygen Cycle Plants and Animals depend on each other to survive 
  4. 4. + Carbon Dioxide – Oxygen Cycle Plants need carbon dioxide to make their own food  Plants give off oxygen. Animals breathe Animals and Humans need oxygen to and Humans breathe out carbon dioxide
  5. 5. + Animal Plant Interactions In an ecosystem populations of living things interact to get resources  Population – all the organisms of a species living in the same area.
  6. 6. + Animal Plant Interactions Resource – something that a living thing needs to stay alive.  examples: food, water, living space, sunlight Plants not only supply a source of food but they also provide shelter
  7. 7. + Animal Plant Interactions Animals depend on plants but plants also depend on animals.  Animals provide nutrients for plants when animals die Animals help plants reproduce
  8. 8. + Animal Plant Interactions Changes that affects plants also affects animals  If trees in a forest are cut down birds & insects lose their shelter.

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