Ecosystems

The part of Earth where organisms can live.

• biotic factors
• biosphere
• ecology
• biology

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Organisms that make up the living part of an ecosystem.

• abiotic
• biotic factors
• ecology
• ecosystems

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The study of interactions in an ecosystem.

• ecology
• philosophy
• scientology
• biology

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A group of the same type of organisms living in the same place at the same time.

• threatened species
• populations
• community
• limiting factor

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All of the populations that live in one area together

• limiting factors

• populations

• community

• speed limit

Decomposers get their food by __________.

• making it themselves
• eating live organisms
• using dead organisms
• eating themselves

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Which is a non-living part of an ecosystem?

• Sunlight
• Air
• Water
• All of these

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Which is a non-living part of an ecosystem?

• Sunlight
• Air
• Water
• All of these

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Below is an example of a simple food chain.

Acorn → Squirrel → Fox → Mountain Lion 

What will most likely happen if squirrels are removed from the food chain?

• The fox will eat acorns
• The fox population will decrease
• The trees will produce fewer acorns.
• The mountain lion population will increase

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In a forest ecosystem, a food chain might look like this:
green plants → rabbit → fox → panther

If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?

• There would be fewer rabbits for the foxes to eat. 
• The panthers would have to begin to eat green plants.
• There would be an increase in the fox population
• There would be more green plants for the rabbits to eat

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