LS.5.2.3 Ecosystem Interdependence

If the amount of wild berries that cardinals use as their main source of energy decreases, what will happen to the cardinal population?

• The population will increase due to more food.

• The population will decrease due to the lack of food.

• The population will remain stable.

• The population will move to a new habitat.

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Initially, what would happen in this food chain if the number of grasshoppers increased? grass → grasshopper → snake → hawk

• More grasshoppers would increase the amount of grass.

• More grasshoppers would reduce the amount of grass.

• There would be less food for the snakes.

• The number of hawks would decrease.

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If a consumer’s food source is unavailable, what could happen to the food chain?

• The consumer would find a new food source and the food chain would remain unchanged.

• The consumer would have to move to find a food source, or die, causing changes to the food chain.

• The food chain would become more stable.

• The consumer would become a producer.

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What is the role of producers in an ecosystem?

• They break down dead organisms.

• They make their own food using sunlight.

• They eat other animals.

• They compete with other organisms for food.

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Which of the following is an example of a decomposer?

• Grass

• Hawk

• Mushroom

• Snake

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What might happen to a forest ecosystem if all the trees were removed?

• The ecosystem would become more stable.

• The population of animals that depend on trees would decrease.

• The amount of sunlight would decrease.

• The number of decomposers would increase.

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In a pond ecosystem, what is the role of algae?

• Consumer

• Producer

• Decomposer

• Predator

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What is an ecosystem?

• A single organism living in isolation.

• A group of the same species living together.

• A community of living organisms and their physical environment.

• A place where only plants grow.

How do consumers obtain energy in an ecosystem?

• By making their own food.

• By eating other organisms.

• By breaking down dead material.

• By absorbing sunlight.

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NGSS.MS-LS2-3

What could happen to a grassland ecosystem if a new predator is introduced?

• The population of prey animals might decrease.

• The ecosystem would become more stable.

• The number of producers would increase.

• The new predator would become a producer.

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