Ecosystems: Human Impact and Interactions

How can planting trees in an urban area be beneficial for the local ecosystem?

• Increases the amount of carbon dioxide in the air.

• Provides habitats for various organisms.

• Decreases the amount of available oxygen.

• Reduces the area's biodiversity.

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What could happen in a food web if a new predator is introduced into an ecosystem?

• The flow of energy will remain unchanged.

• The cycling of matter will stop completely.

• The population of prey species may decrease.

• The ecosystem will become healthier immediately.

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Which of the following is an example of a biotic factor in an ecosystem?

• Sunlight

• Water

• Soil

• Plants

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How can factory pollution affect a nearby river ecosystem?

• It can increase the river's biodiversity.

• It can provide more nutrients for the fish.

• It can harm aquatic life by introducing toxins.

• It can make the water clearer and cleaner.

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If a disease wipes out a large number of herbivores in an ecosystem, what is a likely consequence for the food web?

• The plant population will decrease.

• The carnivore population will increase.

• The flow of energy to the carnivores will decrease.

• The cycling of matter will increase.

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Which of the following interactions is an example of an organism interacting with an abiotic factor?

• A bird building a nest in a tree.

• A fish swimming in the water.

• A bee pollinating a flower.

• A lion hunting a zebra.

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What is one way humans can positively impact an ecosystem?

• Introducing invasive species.

• Conserving natural habitats.

• Overfishing in local waters.

• Polluting air and water.

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How could a prolonged drought affect the cycle of matter in a forest ecosystem?

• It will increase the rate of decomposition of organic matter.

• It will decrease the availability of water for plants and animals.

• It will have no effect on the ecosystem.

• It will increase the growth rate of plants.

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Which of the following is an example of healthy interaction in an ecosystem?

• A forest with only one type of tree.

• A pond with a balanced number of predators and prey.

• A desert without plant life.

• A river with high levels of pollution.

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What is a potential negative impact of deforestation on an ecosystem?

• Increases the number of animal species.

• Improves soil quality.

• Reduces the available habitat for wildlife.

• Increases the amount of oxygen in the atmosphere.

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