Unit 7 Science Review

If a small fish is removed from a pond ecosystem, the change would be

• more plants and less food for big fish

• less plants and more big fish

• more plants and more food for big fish

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Small fish eat the plants in a pond. How are the fish affected if most of the plants die?

• small fish would start to die

• small fish would have more food

• it would not affect the small fish

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An ecosystem with drought conditions have

• lots of sun, and are dry and hot

• lots of sun and are very wet

• a lot of water and are hot

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How could a flood affect organisms in an ecosystem?

• All of them will perish

• some will move to a different environment

• all of the organisms will be fine

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There is a drought in a pond ecosystem. What would most likely occur?

• all insects will die

• there will be more frogs

• fish will die

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The energy flows in this food chain

• from the hawk to the finch

• from the grass to the snake

• from the snake to the hawk

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A bird eats seeds, spiders, and crickets. What would likely happen if the bird disappeared from its ecosystem.

• there would be no more seeds

• there would be a decrease in spiders

• there would be an increase in crickets

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A fish eats mosquito larvae and water plants. What would likely happen if the fish were removed from the ecosystem?

• There would be a decrease in mosquito larvae

• There would be an increase in water plants

• there would be no change

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Which correctly shows the flow of energy in a grassland ecosystem?

• hawk, snake, mouse, grasshopper

• grasshopper, hawk, snake, mouse

• grasshopper, mouse, snake, hawk

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Which populations most likely live in a pond ecosystem?

• dragonflies, sharks, squirrels

• ducks, frogs, dragonflies

• fish, wolves, frogs