Ecosystems Review

Which of the following statements about energy flow in an ecosystem is TRUE?

• Energy flows from producers and consumers to decomposers.

• Energy flows from producers, consumers, and decomposers to the Sun.

• Energy flows directly from the Sun to consumers.

• Energy flows from consumers to decomposers and from decomposers to consumers.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which BEST explains the relationship between predator and prey?

• there is no relationship between the predator and prey populations

• as the number of prey decreases, the number of predators increases

• as the number of prey increases, the number of predators decreases

• as the number of prey increases, the number of predators increases

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following statements about the trophic pyramid shown below is TRUE?

• Trophic level A has the highest amount of available energy.

• Trophic level D has the highest amount of available energy.

• Autotrophs are found in Trophic levels B, C & D.

• Energy flows from trophic level D down to trophic level A.

Tags

NGSS.MS-LS2-3

How does energy flow through an ecosystem?

• sunlight --> primary consumers --> secondary consumers --> producers

• sunlight --> producers --> primary consumers --> secondary consumers

• secondary consumers --> primary consumers --> producers --> heat

• heat --> producers --> secondary consumers --> primary consumers

Tags

NGSS.MS-LS2-3

The following organisms share a habitat: spider, snake, grass, mouse, hawk. Which of the following does NOT get its energy by eating other organisms?

• spider

• snake

• grass

• hawk

Tags

NGSS.MS-LS1-6

Which of the following are producers in a marine ecosystem?

• phytoplankton

• seaweed

• whales

• krill

Tags

NGSS.MS-LS2-3

Which relationship below is an example of a predator-prey relationship?

• A squirrel eats a nut.

• A rabbit eats a carrot.

• A house cat eats cat food.

• A bear eats a salmon.

Tags

NGSS.MS-LS2-2

Which of the following factors have the greatest impact on high density populations?

• pollution from power plants

• disease outbreaks

• natural disasters

• competition between individuals

Tags

NGSS.MS-LS2-4

Why is there an arrow pointing from each organism to the decomposers?

• Decomposers break down all organic matter

• Decomposers do photosynthesis and start the food chain

• Energy flows from decomposers to secondary consumers

• Energy flows from sunlight to decomposers

Tags

NGSS.MS-LS2-3

If habitat space is greatly reduced, what is likely to happen?

• competition would increase

• competition would decrease

• artificial selection would occur

• populations would decrease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4