NC 5.L.3

Which best explains the role of decomposers in an ecosystem

• Decomposers release energy from the decomposition of atmospheric gases in terrestrial environments or to the water in aquatic environments.

• Decomposers convert carbon dioxide and water into simple carbohydrates in terrestrial environments or to the water in aquatic environments.

• Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments.

• Decomposers absorb energy from the synthesis of inorganic compounds in terrestrial environments or to the water in aquatic environments.

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NGSS.MS-LS2-3

In a food chain, food web, or energy pyramid how does the energy flow through the ecosystem. Describe this using producer, consumers, and decomposers. You may use primary, secondary, tertiary, autotroph, and hetotroph.

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NGSS.MS-LS1-6

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Use the food web diagram to answer the question. Which organisms in the food web are competing for the same food resource?

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NGSS.MS-LS2-1

In the ocean, a sea anemone attaches itself to the shell of a hermit crab. The stinging arms of the sea anemone protect the hermit crab, while the movement of the hermit crab brings food to the sea anemone. Which best describes the relationship between the sea anemone and the hermit crab?

• coexistence

• mutualism

• competition

• parasitism

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NGSS.MS-LS2-2

This energy pyramid model the flow of energy between organisms. Use the diagram to help you answer the question.

• The energy needs of organisms increase from level to level in an ecosystem. With each level of the pyramid, only 10% of the energy available is used by organisms.

• The energy needs of organisms decrease from level to level in an ecosystem. With each level in an ecosystem transferring only 10%. This means that the remaining 90% is the energy used and lost as heat.

• The energy needs of organisms increase from level to level in an ecosystem. Therefore, the total amount of energy available at each level increases in an ecosystem.

• The energy needs of organisms do not flow from level to level in an ecosystem. Therefore, the total amount of energy stays the same in an ecosystem.

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NGSS.MS-LS2-3

Interactions among organisms can: CLICK ALL THAT APPLY

• create stability within ecosystems

• facilitate or restrain (limiting factors) growth

• enhance or limit the size of populations

• maintaining the balance between available resources and those who consume them

• change only biotic factors

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NGSS.MS-LS2-1

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Plants use CO2 in the process of ___________________ to make ___________ and oxygen.

• cellular respiration, water

• photosynthesis, glucose (sugar)

• photosynthesis, water

• cellular respiration, glucose (sugar)

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What kind of Ecosystem is known as sustainable?

• The one in which all species are in balance

• The one in which there are no animals

• The one in which animals feed on each other

• None of the above

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

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A lion is at the top of the food chain, where it is responsible for eating numerous animal species. The lion's job in its ecosystem is to help control the population of other animals in the ecosystem by hunting and eating them. Which of the following best describes the role of a lion within its ecosystem?

• The one in which all species are in balance

• The one in which there are no animals

• The lion’s niche as a predator within the ecosystem

• The lion's niche as decomposer within the ecosystem

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NGSS.MS-LS2-4

The chart below shows the human population and the fox population in an area. Use the chart to answer this question. Which best explains the relationship between the human and fox populations in the ecosystem?

• Humans compete for the same space as foxes, causing the fox population to decrease.

• Humans compete for the same prey as foxes, causing the fox population to decrease.

• Humans are affected by the same diseases as foxes, causing both populations to change in the same way.

• Human populations and fox populations are not interconnected.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4