Nitrogen Cycle

What are the two things that can break the triple bond in N₂?

• Nitrogen Fixing Bacteria and Legumes

• Lightning and Legumes

• Nitrogen Fixing Bacteria and Lightning

How do animals get the nitrogen they need?

• From the air they breathe

• From the water they drink

• From the food they eat

• From the sun

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NGSS.MS-LS1-7

NGSS.MS-LS2-3

What is the formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

Tags

NGSS.MS-PS1-1

Plants and animals cannot use nitrogen directly from the air.

• True

• False

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

Bacteria fix nitrogen from the atmosphere into a form plants can use.

• True

• False

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NGSS.MS-LS2-3

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

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NGSS.MS-PS1-1

If the atmosphere is full of N₂, why can't we just get our nitrogen by breathing?

• We have no mechanism to break the triple bond of nitrogen between the atoms.

• Our lungs would be damaged by the N₂.

• We need oxygen for cellular respiration.

• The legumes take N₂ up first.

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NGSS.HS-LS1-7

What happens when organisms die and decay? 

• Their bodies are lifted up
• Their nitrogen returns to the soil
• they keep their nitrogen
• They stay on earth forever

Tags

NGSS.MS-LS2-3

Nitrification happens in the ______

• Air 
• Soil 
• Ground Water 
• Plants 

Tags

NGSS.MS-LS2-3

Which plant is an example of a legume?

• strawberries

• carrots

• peanuts

• corn