Trophic Levels

What is the primary source of energy for most food chains?

• The Moon

• The Sun

• Wind

• Water

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following organisms is a producer in a food chain?

• Lion

• Grass

• Eagle

• Rabbit

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In a food chain, which of the following is a primary consumer?

• Grass

• Rabbit

• Snake

• Hawk

What is the role of decomposers in an ecosystem?

• They produce energy from sunlight.

• They break down dead organisms and recycle nutrients.

• They are the top predators in a food chain.

• They consume primary producers.

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NGSS.MS-LS2-3

Which of the following best describes the energy flow in a food chain?

• Energy flows from consumers to producers.

• Energy flows from decomposers to producers.

• Energy flows from producers to consumers.

• Energy flows from the top predator to the primary consumer.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does energy transfer between trophic levels in a food chain?

• Energy is completely transferred from one level to the next.

• Only a small percentage of energy is transferred to the next level.

• Energy is transferred equally among all levels.

• Energy is lost entirely at each level.

Tags

NGSS.MS-LS2-3

Explain why the trophic pyramid is typically narrower at the top than at the bottom.

• There are more producers than consumers.

• Energy is lost as heat at each trophic level.

• Decomposers are more numerous than producers.

• Predators reproduce faster than prey.

Tags

NGSS.MS-LS2-3

Which of the following best describes a food chain?

• A complex network of interconnected food webs.

• A linear sequence of organisms where each is eaten by the next.

• A circular flow of energy among organisms.

• A random assortment of organisms in an ecosystem.

Analyze the impact of removing a top predator from a food chain.

• The population of primary consumers will decrease.

• The population of producers will increase.

• The ecosystem will remain unchanged.

• The population of primary consumers will increase.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Predict the effect on an ecosystem if all decomposers were removed.

• Nutrient cycling would stop, leading to a buildup of dead matter.

• Producers would increase in number.

• Energy flow would increase.

• Consumers would become producers.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4