Changes in the Ecosystem

In a pond ecosystem, what would happen to frogs if the insect population decreased?

• There would be more frogs in the pond

• There would be more insects in the pond

• There would be less frogs in the pond

• More fish would move to the pond

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What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase

• The number of plants would increase

• all organisms would adapt

• All living organisms would eventually die

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Which would cause an ecosystem to change quickly ?

• an earthquake

• a lake drying up

• a climate change

• a lake becoming a marsh

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In what ways can humans change an ecosystem?

• By making a region flood

• By creating hurricanes

• By adding to the amount of pollution in an ecosystem

• By enjoying nature

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Which of the following would have a negative impact on an ecosystem ???

• Constructing highways

• Planting trees

• Recycling paper

• Children playing with butterflies

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Raccoons eat aquatic animals. If chemicals entered the lake with rain water and destroyed the plants, how would this impact the raccoon population?

• Raccoons would have more aquatic animals to eat.

• Raccoons would begin eating land plants.

• Raccoons would have less aquatic animals to eat.

• Raccoons would only drink water.

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Why would algae grow in a lake?

• Because the lake is polluted

• The lake is a newly created ecosystem

• Because there are a lot of fish in the lake

• A natural disaster destroyed the lake

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All the living and nonliving things that interact with each other in an environment

• Ecosystem

• Environment

• Habitat

• Conservation

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What is the purpose of succession?

• to put an end to the creation of new ecosystems

• to form a complete ecosystem

• to have ecosystems that last longer than 2 years

• to eliminate the need for conservation

What is it called when changes occur in an ecosystem that already exists?

• primary succession

• secondary succession

• conservation

• pollution

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