Ecosystems/ Food Chains

Look at the food web. Which organisms are competing with each other?

• algae and fish

• fish and squid

• seal and penguin

• fish and killer whale

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

In an ocean food chain, which receives energy directly from the Sun?

• crab

• limpet

• seagull

• seaweed

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Look at the food web. What would most likely happen if a large number of snakes died?

• The number of mice would increase.

• The number of rabbits would decrease.

• The hawk would eat fewer mice and rabbits.

• The hawk would eat more grass.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

How is energy first supplied to a food web?

• Carnivores release nutrients.

• Predators consume prey.

• Plants carry out photosynthesis.

• Omnivores eat dead organisms.

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NGSS.MS-LS1-6

Look at the food chain.

Corn -----> mouse-----> snake----> owl

Which organism is both a predator and a prey?

• corn

• mouse

• snake

• owl

Seagulls and seals both eat fish and crabs.

What would most likely happen to the crab population if the number of fish greatly decreased?

• it would disappear

• it would decrease

• it would increase

• it would stay the same

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Look at the food chain.

algae----> krill----> herring-----> salmon-----> shark

Which organism would be at the top of an energy pyramid?

• algae

• krill

• salmon

• shark

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NGSS.MS-LS2-3

This diagram shows a food pyramid. Explain why the grasshoppers are above the grass level.

• They eat the eagle

• They eat grass

• They eat birds

• They are tertiary consumers

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NGSS.MS-LS2-3

A model of how food chains overlap is called a food web.

• True

• False

Which is NOT a living part of an ecosystem?

• fungus

• sun

• tree

• fly