Ecosystems-5th Grade

A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem?

• Both the lizard population and the hawk population will increase.

• Both the lizard population and the hawk population will decrease.

• The lizard population will increase, but the hawk population will decrease.

• The lizard population will decrease, but the hawk population will increase.

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Which will most likely cause a decrease in predator populations?

• an increase in prey populations

• a decrease in prey populations

• a decrease in decomposers

• an increase in producers

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As more people have moved to the beach, the sea turtle population has decreased. Which is most likely the cause of this decrease?

• tropical storms

• increase in predators

• habitat loss

• warmer temperatures

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NGSS.MS-ESS3-4

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Which is an example of a decomposer?

• a hawk

• a mouse

• a flower

• a mushroom

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In a grassland ecosystem, if the population of eagles suddenly decreased, what will most likely be the effect on the rest of the ecosystem?

• The ecosystem will become overpopulated with snakes.

• There will be a decrease in the population of snakes in the ecosystem.

• The nutrition of the soil in the ecosystem will decrease.

• More types of plants will begin growing in the ecosystem.

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Which is most responsible for recycling dead plants and animals in an ecosystem?

• water

• bacteria

• fish

• insects

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Which organism is a producer?

• frog

• mushroom

• grass

• lizard

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A carnivore that feeds on the bodies of dead organisms

• omnivore

• prey

• producer

• scavenger

A process by which plants use the sun's energy to make food

• condensation

• organism

• carnivore

• photosynthesis

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A non living thing is

• biotic

• abiotic

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