Flow of Energy through a Food Web

Consider the following food chain:

Kelp (producer) --> sea urchin --> sea otter --> orca whale

If placed in an energy pyramid, which organism should be placed at the TOP of the pyramid?

• kelp

• sea urchin

• sea otter

• orca whale

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following organisms is an omnivore?

• plants(make their own food through photosynthesis)

• mushroom (decomposes and absorbs nutrients from decaying matter)

• bear (eats berries, fish, bird eggs, nuts, small mammals)

• alligator (eats small mammals, birds, reptiles, amphibians)

Which food chain best shows the flow of energy in a woodland ecosystem?

• bear--> eagle --> squirrel --> nut

• grass --> grasshopper --> mouse --> snake

• mouse --> berries --> bear --> mushroom

• deer --> wolf --> snake --> eagle

Tags

NGSS.MS-LS2-3

Based on this food web, which organisms are direct sources of energy for secondary consumers?

• owls and foxes

• rabbits, mice, and grasshoppers

• carrots, grasses, and grains

• birds, foxes, and rabblits

Tags

NGSS.MS-LS2-3

Based on this food web, which organism feeds on two of the producers shown?

• rabbits and grasshoppers

• birds and mice

• foxes and owls

• grasses and grains

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-2

According to the food web shown, which two organisms population would increase (go up) if the bird suddenly disappeared from the food web?

• rabbits and foxes

• mice and grasses

• owls and carrots

• grains and grasshoppers

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following organisms population would decrease if carrots were no longer available in this particular ecosystem?

• rabbit

• mouse

• owl

• bird

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An energy pyramid is shown.

Which sentence best describes how energy flows through the pyramid?

• The organisms at the bottom trophic level provide energy directly to organisms in all the other trophic levels.

• Energy is transferred from organisms in one trophic level to those in the trophic level above.

• The energy lost at each trophic level is consumed (eaten) by organisms in the top trophic level.

• Energy is transferred down each trophic level of the energy pyramid.

Tags

NGSS.MS-LS2-3

Which organism shown in the energy pyramid receives the least amount of direct energy from producers?

• grass

• rabbit

• snake

• hawk

Tags

NGSS.MS-LS2-3

Refer to the energy pyramid shown. Which organism is a primary consumer?

• grass

• rabbit

• snake

• hawk

Tags

NGSS.MS-LS2-3