Ecosystem Energy Flow

The grey wolf inhabits the North American forest. It depends on animals like deer, elk, moose, bison, bighorn sheep, caribou, and musk oxen for its survival.

How do these animals help the grey wolf survive?

• by supplying food to the grey wolf

• by giving companionship to the grey wolf

• by eliminating competitors of grey wolf

• by protecting the grey wolf from predators

Tags

NGSS.MS-LS2-1

Many animals eat both plants and other animals. Which term describes animals who fulfill this role in a food web?

• producers

• scavengers

• decomposers

• consumers

Tags

NGSS.MS-LS2-3

The table shows the main food source of different organisms that make up a food chain.

Which set of trophic levels correctly describes the organisms?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which food chain accurately

shows the flow of energy in a field ecosystem?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-3

The diagram shows a food web.

Which two organisms share the same trophic level?

• Hawk and Rabbit

• Deer and Frog

• Cricket and Mouse

• Deer and Cricket

Which statement best explains the reason for the decrease in available energy with each higher trophic level?

• Some energy is lost to the environment.

• Some energy is converted into food.

• Some energy is consumed by the decomposers.

• Some energy is broken down by the consumers.

Tags

NGSS.MS-LS2-3

A wolf eats deer that feed on plants. An incomplete energy pyramid diagram is shown.

At which level do the deer belong in the energy pyramid?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The diagram shows a pond food web.

According to the diagram, which organism is a producer?

• Dragonfly

• Grass

• Algae

• Frog

Which statement about the food web is true?

• There are more consumers than producers.

• There are more producers than consumers.

• The ecosystem does not contain any carnivores

• The organisms with the most energy available are the snake and hawk.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

What does the shape of the energy pyramid indicate about the flow of energy in an ecosystem?

• Energy flows from trophic level 1 to trophic level 4.

• Energy flows from trophic level 4 to trophic level 1.

• The energy available to each trophic level is equal.

• The energy available to trophic level 1 and 2 is less than tropic levels 3 and 4.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3