NGSS.MS-LS2-3

 Bacteria that help break down dead material in the environment are called 

• vaccines
• decomposers
• oats

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NGSS.MS-LS2-3

Which best describes what a food chain shows you?

• Energy flow through an ecosystem
• Food flowing through an ecosystem
• Consumers going into other consumers
• Who eats who

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NGSS.MS-LS2-3

Who does the owl get energy from? 

• Grass
• Grasshopper
• Mouse
• Ow

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NGSS.MS-LS2-3

Coal is formed from

• plant remains decomposed under pressure.
• melted and cooled metamorphic rock.
• natural gas subjected to heat.
• seas that have evaporated.

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NGSS.MS-LS2-3

In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

• 10%
• 20%
• 80%
• 90%

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NGSS.MS-LS2-3

A student builds a model to show how pollutants move through an ecosystem. In plastic tub, the student places a layer of small marbles, covers it with a thick cloth, and then adds a layer of sand. The student then sprinkles red powdered paint on top of the soil. When the student sprays water onto the model, red color appears in the cloth and in the water in the layer of marbles. Which part of the model represents pollutants introduced by humans?

• The marbles

• The thick cloth

• Red powdered paint

• Layer of sand

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NGSS.MS-LS2-3

each level in the transfer of energy through an ecosystem

• ecological level

• trophic level

• tophoal level

• photic level

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An ecosystem contains living and nonliving things.

• True
• False

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NGSS.MS-LS2-3

How might clearing forest areas for the construction of factories potentially affect the stability of the carbon cycle?

• A greater amount of oxygen will be released into the atmosphere by the construction of the factories while a decreased amount of carbon dioxide is produced by the remaining forest areas.

• A lesser amount of carbon dioxide will be taken in and used for food production by forests while more carbon dioxide is produced by factories.

• The amount of carbon dioxide available for photosynthesis in the remaining forest areas will be decreased due to the construction of factories.

• The amount of oxygen in the atmosphere available for animal respiration will likely increase due to deforestation.

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NGSS.MS-LS2-3

An incomplete food web has been drawn for you. Complete it by filling in each of the empty circles with the member of the correct animals or plants from the list. Remember that the arrows represent energy flow and go

• Caterpillar

• Hawk

• Corn

• Snake

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NGSS.MS-LS2-3