5.L.2.3 Checkpoint

The number of fish in a lake suddenly increases. How will the increase most likely affect the lake?

• There will be less water in the lake.

• There will be fewer insects in the lake.

• More plants will grow in the lake.

• More frogs will live in the lake.

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Which is the most important reason endangered species should be protected?

• People pay a lot of money to visit zoos and see endangered animals.

• Protecting endangered species removes pollution from the environment.

• Endangered species are viewed as unique by the people in the community. When any en

• When any endangered species dies, it affects other animals within the ecosystem.

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Which best explains how organisms in an overpopulated community interact with each other?

• They compete with each other for food and survival.

• They occupy different habitats to avoid overcrowding.

• They work together to gather food for their community.

• They use fewer resources so that there is enough for each organism.

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In a grassland ecosystem, lions prey on wildebeest. The population of lions has declined steadily because of illegal hunting. What will most likely happen to the new population of wildebeest?

• The wildebeest population will increase.

• The wildebeest population will decrease.

• The wildebeest population will remain the same.

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Which will most likely happen to the grasshopper population if the grass population decreases?

• The grasshopper population will increase because there will be less competition.

• The grasshopper population will decrease because there will be more competition.

• The grasshopper population will increase because there will be more food available.

• The grasshopper population will decrease because there will be an increase in the predator population.

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When does the greatest competition occur for food and water between organisms from different populations?

• when the populations require similar shelter

• when the populations are in different ecosystems

• when the populations occupy the same niche

• when the populations hunt at the same time of day

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NGSS.MS-LS2-2

Which is most likely an effect of construction on a forest ecosystem?

• Construction will decrease the amount of sunlight for the ecosystem.

• Construction will increase the amount of food for organisms in the ecosystem.

• Construction will increase the number of trees and smaller plants growing in the ecosystem.

• Construction will decrease the amount of natural cover and nesting places for organisms in the ecosystem.

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In a food chain, foxes are consumers of rabbits and mice. If the mice population suddenly decreases, what will most likely happen to the number of foxes?

• The number of foxes will increase because they will eat fewer rabbits.

• The number of foxes will stay the same because they will eat more rabbits.

• The number of foxes will decrease because they will be eaten by the rabbits.

• The number of foxes will decrease because they will only have one remaining food source.

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Which is a possible result of humans destroying habitats?

• an increase in available niches

• an increase in the number of prey

• an increase in the number of predators

• an increase in the number of endangered species

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Which best explains how abiotic factors affect organisms in an ecosystem?

• Abiotic factors rely on living organisms to survive in an ecosystem.

• Abiotic factors affect the food chain of organisms within the ecosystem.

• Abiotic factors determine the amount of pollution present in an ecosystem.

• Abiotic factors affect the type and number of organisms living in an ecosystem.

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