Lesson #2: The Nitrogen Cycle

Remember that a reservoir is a storage place in a nutrient cycle where the nutrient will remain for some time. List three reservoirs found in the nitrogen cycle.

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If nitrogen from the atmosphere is continually being used, what keeps the atmosphere

from running out of nitrogen?

• More nitrogen is made in the sun.

• Extra nitrogen is stored in the clouds.

• As dead organisms decompose, the nitrogen from their bodies is converted back into

  nitrogen gas.

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NGSS.MS-LS2-3

The majority of the world's nitrogen is found in a (solid / liquid / gaseous) state.

• solid

• liquid

• gaseous

If nitrogen from the atmosphere is continually being used, what keeps the atmosphere

from running out of nitrogen?

• More nitrogen is made in the sun.

• Extra nitrogen is stored in the clouds.

• As dead organisms decompose, the nitrogen from their bodies is converted back into

  nitrogen gas.

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NGSS.MS-LS2-3

True/False: Nitrogen Fixation can only be performed by animals.

• true

• false

True/False: The ocean is the largest reservoir in the water cycle.

• False
• True

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NGSS.MS-ESS2-4

For the activity listed, select the kind of change that is taking place.

an ice cube melting

• physical

• chemical

Tags

NGSS.MS-PS1-4

For the activity listed, select the kind of change that is taking place.

a cake baking

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

For the activity listed, select the kind of change that is taking place.

paper being cut

• physical

• chemical

Which of the following is not true of blizzards?

• Strong winds move snow on the ground and falling snow.

• They occur because of differences in air pressure.

• They happen only in regions near the North Pole

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6