Populations and Ecosystems Vocab

In which ecosystem will you find this food-chain?

• African grasslands

• Arctic tundra

• Amazon rain forest

• American wetlands (swamp)

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What will happen to a population if they do not have enough resources?

• The population will grow bigger

• The population will all die

• The population will have to move away or they will die

• The population will sit and wait for new resources

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Why are decomposers important in an ecosystem?

• They directly give energy to consumers.

• They break down dead things and put nutrients back in the ground.

• They are not important they are harmful.

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When does COMPETITION happen in an ecosystem?

• When there is enough resources for all living things to survive.

• When animals move away from their ecosystem.

• When two or more living things need the same resource to survive.

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Some animals change their environment by burrowing in the ground. This means they make tunnels in the ground. How can this be a HELPFUL change?

• They can destroy the roots of plants.

• They put air in the ground that makes it easy for water to flow through.

• They can cause erosion- the ground moves away.

• They destroy habitats of other animals that live in the ground.

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A biotic factor is...

• any living factor in an ecosystem

• any nonliving factor in an ecosystem

• a robot in an ecosystem

• a type of rock

Carrying capacity is...

• The maximum resources that a population can hold.

• The maximum population an ecosystem can hold based on its resources.

• The maximum amount a person can carry.

• The maximum population in an area.

Jenn is studying a population of fish found in a pond that has a decreasing carrying capacity. Which of the following factors would not decrease the carrying capacity of her fish?

• drought

• flooding

• food shortages 

•  a freeze  

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An organism that must obtain its energy by consuming other organisms

• Autotroph/producer

• Heterotroph/Consumer

• Photosynthesis

• Cellular Respiration

Define: Biotic

• Process that does not require oxygen

• Process that requires oxygen

• Non-living things (rocks, water, temperature)

• living things (animals, plants, etc)

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