Food Web and Trophic Pyramid

What is a food web?

• Nature's recyclers

• A food web is a model that shows the feeding relationships between organisms in an ecosystem.

• A food web is how much energy flows from one stage to the next in a food chain.

• An individual path of matter and energy.

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NGSS.MS-LS2-3

Fill in the blank.

Food web models represent energy flow using ___________.

• Arrows

• Pyramids

• Equal Signs

• Lines

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NGSS.MS-LS2-3

True or False.

Matter flowing through a food web cannot take more than one path.

• True (Don't listen to false)

• False (Matter flowing through a food web CAN take more than one path.)

Tags

NGSS.MS-LS2-3

Fill in the blank.

A food chain is ____________.

• anything that has mass or volume.

• an individual path in a food web.

• an increase in rabbits causes a decrease in plant populations.

• the feeding relationships between organisms in an ecosystem

Tags

NGSS.MS-LS2-3

What is the purpose of a food chain?

• A food chain is a 'food chain'.

• A food chain is a oversimplification of a food web

• A food chain tracks the transfer of matter and energy.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Define a direct effect in an ecosystem.

• A indirect effect in a food web is an interaction where one population directly affects the abundance of another.

• A direct effect in a food web is an interaction where one population indirectly affects the abundance of another.

• A direct effect in a food web is an interaction where one population directly affects the abundance of another.

• None shown here.

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NGSS.MS-LS2-4

Fill in the blank.
An indirect effect is an interaction in a food web where __________________.

• the feeding relationships between organisms in an ecosystem.

• one population affects the abundance of another through its effect on a third population.

• Decomposers act as nature’s recyclers.

• energy flows from one stage to the next in a food chain.

Tags

NGSS.MS-LS2-2

What are decomposers?

• an individual path in a food web

• a kind of consumer that uses the wastes or dead remains of other organisms as a source of energy and matter

• an interaction in a food web where one population affects the abundance of another through its effect on a third population

• a model that shows how much energy is transferred from one stage to the next in a food chain

Tags

NGSS.MS-LS2-3

Which of these are a form of waste

• Feathers

• Fungi

• Dung

• Dead organisms

• Dead leaves

Tags

NGSS.MS-LS2-3

True or False?

Decomposers are a type of consumer.

• False

• True