Chapter 17 Science

Why do ecosystems not have energy cycles?

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Which correctly represents the flow of energy in a food chain?

• producer --> decomposer --> consumer --> carnivore

• decomposer --> producer --> herbivore --> carnivore

• producer --> herbivore --> decomposer --> carnivore

• producer --> herbivore --> carnivore --> decomposer

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NGSS.MS-LS2-3

What percentage of energy from one level of an ecological pyramid is transferred to the next level?

• 1

• 10

• 50

• 90

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Each level in an ecological pyramid is called a(n) ______?

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NGSS.MS-LS2-3

Draw an ecological pyramid with 3 levels and label each with an appropriate organism

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Which of these is an independent organism?

• elephant

• bird

• lion

• bear

When an essential factor is in short supply, _____ may occur

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What is obligatory mutualism?

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A relationship in which one population benefits but the other is unaffected is called

• mutualism

• parasitism

• commensalism

• camoflauge

Which two are examples of a decomposer?

• beetle

• elephant

• crow

• bacteria

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NGSS.MS-LS2-2

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