Trophic levels and Food Webs

What is a producer in a food chain?

• An organism that feeds on other organisms

• An organism that is eaten by a secondary consumer

• An organism that is at the top of the food chain

• An organism that can make its own food

Tags

8.L.3.3

What happens to the energy as you move up the trophic levels in a food chain?

• It decreases

• It increases

• It is lost in heat or undigested

• It remains the same

Tags

8.L.3.3

What can happen if a species is removed from a food chain?

• Other organisms may not have enough to eat

• The energy flow will reverse

• The food chain will collapse

• The biodiversity will increase

Tags

8.L.3.3

What is a food web?

• A network of interconnected food chains in an ecosystem

• A group of organisms that interact with each other in an ecosystem

• A diagram showing the flow of energy in an ecosystem

• A single linear chain of organisms in an ecosystem

Tags

8.L.3.3

What does biodiversity refer to?

• The variety of organisms living in a given area

• The size of the area in an ecosystem

• The number of trophic levels in a food chain

• The amount of energy stored in each trophic level

Tags

8.L.3.3

Why is biodiversity important for the sustainability of an ecosystem?

• It increases the number of apex predators

• It reduces the energy flow in the food chain

• It makes the ecosystem more resilient to changes

• It decreases the number of primary consumers

Tags

8.L.3.3

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Trophic levels are represented by 

• squares
• circles
• pyramids
• lines

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%
• 90%
• 10%
• 20%

Tags

NGSS.MS-LS2-3

An organism that obtains energy by eating other organisms.

• Consumer
• Producer
• Decomposer
• Detriov

Tags

NGSS.MS-LS2-2