What is the ultimate source of energy for all living organisms in an ecosystem?

• Plants

• Producers

• Fungus and bacteria

• The sun

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A diagram with arrows showing energy flow from grass to mouse to a snake is...

• An energy pyramid

• A food web

• A food chain

• A population chart

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NGSS.MS-LS1-6

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In a food web, which organisms only have arrows pointing away from them?

• Omnivores

• Herbivores

• Decomposers

• Producers

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NGSS.MS-LS2-3

In an ecosystem, a food web...

• Is identical to a food chain

• Consists solely of plants and herbivores

• Is a complex network of interconnected food chains

• Has only one predator and one prey

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NGSS.MS-LS2-3

What do the arrows in a food chain or food web represent?

• the location and movement of organisms

• which organisms are most closely related

• the movement of carbon dioxide through the organisms

• the transfer of matter and energy through the organisms

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NGSS.MS-LS2-3

In a food web, arrows point in just one direction because they show how the energy goes to the animal that is _____.

(a)  

• eating
• eaten

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NGSS.MS-LS1-6

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Which organism is the primary consumer in this food chain?

• plant

• caterpillar

• spider

• dog and cat

In this food web, how many food sources does the lion have?

• 1

• 2

• 3

• 4

Carnivores and herbivores are both consumers. Which statement best describes how they differ from one another?

• Carnivores produce all the energy they need.

• Carnivores eat only animals whereas herbivores eat only plants.

• Carnivores eat living organisms whereas herbivores eat organisms that have died.

• Carnivores obtain energy by eating food whereas herbivores obtain energy from sunlight.

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NGSS.MS-LS2-2

The removal of which organism would have the GREATEST effect on all remaining organisms in the food web?

• producer

• primary consumer

• secondary consumer

• tertiary consumer

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NGSS.MS-LS2-3

NGSS.MS-LS2-4