Changes in an Ecosystem

What happens when humans bulldoze an ecosystem?

• a natural disaster happens

• only trees will be destroyed

• the animals and plants will be forced to go away

• the community will be destroyed

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Ecosystems are complex. What features must an ecosystem have to be balanced?

• Consumers and decomposers

• Producers and nonliving things

• Producers, nonliving things, consumers, and decomposers

• producers, consumers, and decomposers

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What is a negative of the picture of the manmade changes compared to the natural habitat image?

• The animals will get more food than before

• It destroys the animals' habitat.

• The animals are safe and have found homes more easily.

• There is less pollution than before.

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What is a positive in the after image compared to the before image?

• There are more animals because of an increase of plants.

• There is less animals because humans adopted them.

• There water supply evaporated because of heat over time.

• The water supply went up.

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Is the after image a mostly positive image or a mostly negative image?

• Mostly negative image

• Mostly positive image

• Mostly trashy image

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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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