Ecosystems are composed of living things like populations of different species that make up a biological community, as well as nonliving physical factors. All energy in ecosystems ultimately comes from the sun and is transferred between organisms, with producers like plants harnessing solar energy, consumers eating producers or other organisms, and decomposers breaking down dead organic matter. Ecosystems can change due to natural causes such as drought, disease, fires or overpopulation, or due to human activities including various types of pollution and construction.
6. What makes ecosystems different?
Amount of water
Amount of sunlight
Type of soil
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7. Name the three members in
every community.
Producers
Consumers
Decomposers
8. What causes ecosystems to change?
Natural causes:
Drought
Disease
Fire
Overpopulation
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9. What causes ecosystems to change?
Changes caused by humans:
Water pollution
Air pollution
Land pollution
Construction
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10. How can humans help to prevent
changes in ecosystems?
Use resources wisely
Laws that control pollution
Clean up litter
Keep rivers and lakes clean
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