5.12B Ecosystem Energy and Matter Quiz

What is the primary source of energy for most ecosystems?

• The Moon

• The Sun

• The Earth's core

• Ocean currents

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In a food web, which of the following organisms is most likely to be a producer?

• Rabbit

• Grass

• Hawk

• Snake

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If a disease reduces the population of primary consumers in an ecosystem, what is the most likely effect on the producers?

• Producers will increase

• Producers will decrease

• Producers will remain the same

• Producers will become extinct

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Which of the following best describes the role of decomposers in the cycling of matter?

• They produce energy from sunlight

• They break down dead organisms and recycle nutrients

• They consume primary producers

• They compete with herbivores for food

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How does energy flow through a food web?

• From decomposers to producers

• From producers to consumers

• From consumers to producers

• From the top predator to the sun

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What might happen to a food web if a top predator is removed?

• The population of prey species will decrease

• The population of prey species will increase

• The producers will become extinct

• The ecosystem will remain unchanged

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Which of the following is an example of a primary consumer?

• Oak tree

• Grasshopper

• Eagle

• Mushroom

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What is the role of the sun in the cycling of matter and flow of energy in an ecosystem?

• It provides heat for decomposers

• It is the initial source of energy for producers

• It recycles nutrients in the soil

• It is consumed by herbivores

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If a new plant species is introduced to an ecosystem and becomes a dominant producer, what is a possible effect on the existing producers?

• Existing producers will increase in number

• Existing producers will decrease in number

• Existing producers will become top predators

• Existing producers will remain unaffected

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Which of the following organisms is most likely to be at the top of a food web?

• Algae

• Deer

• Wolf

• Grass

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