HMH Unit 3, Lesson 3

Front

What factors can lead to an increase in a deer population in a forest ecosystem?

Back

A decrease in predators or an increase in food availability can lead to an increase in the deer population.

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What is the impact on eagle populations if the number of snakes decreases?

Back

Eagle populations will initially decrease if there are fewer snakes.

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Front

What is the primary source of energy in a food chain?

Back

The sun is the original source of energy in every food chain.

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How do frog populations respond to a decrease in snake populations?

Back

Frog populations will initially increase if there are fewer snakes.

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What role do decomposers play in an ecosystem?

Back

Decomposers, such as bacteria, break down dead organic matter, recycling nutrients back into the ecosystem.

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Define a food chain.

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

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What is the difference between a predator and a prey?

Back

A predator is an organism that hunts and eats other organisms (prey), while prey is the organism that is hunted.

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What happens to the food web if a top predator is removed?

Back

Removing a top predator can lead to an increase in the populations of prey species, which may then overconsume vegetation and disrupt the ecosystem.

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What is the significance of producers in a food chain?

Back

Producers, such as plants, convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.

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How do changes in one population affect other populations in an ecosystem?

Back

Changes in one population can have cascading effects on other populations due to interdependence in food chains and webs.

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