LAB QUIZ: Food Chains, Webs & Energy Pyramids (7th)

The study of the interrelationships of plants and animals and their interaction with the physical environment is known as

• evolution

• ecology

• anatomy

• taxonomy

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NGSS.MS-LS2-3

What is the source of all energy shown in the food web?

• green plants

• mice

• the sun

• the soil

Answer explanation

Look at what is at the very beginning of the food web and how those organisms get their energy.

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NGSS.MS-LS1-6

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The bottom level of the energy pyramid contains the most amount of energy in the ecosystem. This level is full of organisms classified as

• herbivores

• primary consumers

• secondary consumers

• producers

Answer explanation

The total amount of energy available in an ecosystem is represented by an energy pyramid. Energy pyramids contain levels that represent each major trophic level. The bottom level of an energy pyramid contains the most amount of energy in the ecosystem.

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NGSS.MS-LS1-6

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What happens to the total amount of energy available in an ecosystem as you go up the energy pyramid?

• Increases

• Decreases

• Stays the same

Answer explanation

The greatest amount of energy is available from the producers at the base of the pyramid. Refer to the diagram shown and think carefully about the shape of the energy pyramid and what happens as you move up towards the top.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

The transfer of energy between organisms in an ecosystem is called a(n) ______________.

• food chain

• consumer

• ecosystem

• decomposer

Answer explanation

This type of diagram shows what each organism eats.

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NGSS.MS-LS1-6

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What process allows plants and other organisms to convert solar energy into chemical energy?

• The water cycle

• Photosynthesis

• Hydrolysis

• Cellular respiration

Answer explanation

This same process occurs in the chloroplast of the cell.

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NGSS.MS-LS1-6

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What happens to the energy that is not transferred in a food chain? (It isn't actually "lost.")

• Some is used to produce waste in the consumer.

• Some is not digestible, some is used, some becomes heat.

• Some consumers are much smaller than their prey.

• Most is used to digest the bones of the organism eaten.

Answer explanation

A food chain is the flow of energy and nutrients between organisms who eat each other. Energy that is not directly transferred in a food chain is not 'lost'. So where does it go?

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What does a food web show?

• The different pathways of energy flow within an environment.

• How animals are related to each other in an environment.

• The number of plants and animals in an ecosystem.

• Pictures of the many plants and animals in an ecosystem.

Answer explanation

A food chain is the flow of energy and nutrients between organisms who eat each other. Each ecosystem in the environment has multiple food chains that can be seen. Most animals are part of several food chains, called a food web.

Tags

NGSS.MS-LS2-3

Which choice best explains the relationship between the deer and the green plant?

• The plant provides the deer with food and oxygen.

• The plant provides the deer with food and carbon dioxide.

• The deer provides the plant with food and oxygen.

• The deer provides the plant with food and carbon dioxide.

Answer explanation

Think about what each organism consumes and produces.

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In a food web, a snake eats a frog. The frog eats grasshoppers. Grasshoppers eat grass. Mice also eat grasshoppers. All of the following are consumers in this food web except for the

• grass

• snake

• mice

• grasshopper

Answer explanation

What is the source of food that everything else can be traced back to?

Tags

NGSS.MS-LS2-2