NGSS.MS-LS2-3

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

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A student sets up a compost bin outdoors. Inside the bin microorganisms convert the student’s vegetable and paper scraps into rich fertilizer. Which of the following best describes the role that these microorganisms play in natural habitats?

• The microorganisms help balance the numbers of producers and consumers.
• The microorganisms help keep nutrients cycling through the ecosystem.
•  The microorganisms turn solar energy into sugars.
• The microorganisms function as autotrophs.

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NGSS.MS-LS2-3

In the energy pyramid here, which organisms have the most energy available?

• Producers
• Carnivores
• Herbivores
• Top Predator

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Energy increases as you move up the food pyramid (from bottom to top).

• True 
• False

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What is this called?

• Food Web
• Food Chain
• Abiotic Factors

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NGSS.MS-LS2-3

The nonliving parts of an ecosystems can be called______.

• biotic factors

• abiotic factors

• friendly factors

• community factors

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What factor makes up the chemical and physical parts of the ecosystem.

• abiotic

• biotic

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Decomposers are important to ecosystems because they...

• return vital nutrients to the ecosystem

• capture energy from the Sun

• are producers

• can be omnivores

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Position that an organism occupies in an energy pyramid based on what it eats

• Producer

• Trophic level

• Heterotroph

• Consumer

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Which animal is the producer?

• plant

• prairie dog

• coyote

• turkey vulture

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NGSS.MS-LS2-3