Nitrogen Cycle Exit Ticket

How much of the atmosphere, and the air we breathe in, is made up by nitrogen gas? (there are more than one right answer)

• 87%

• 78%

• more than 50%

• less than 50%

• 42%

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

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Organisms that need nitrogen to survive

• only plants
• only animals
• only bacteria
• all living organisms

If the atmosphere is 78% 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 it up first.

Plants and animals cannot use nitrogen directly from the air.

• True
• False

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NGSS.MS-LS2-1

Based on this diagram, which of the following can you infer is the chemical formula for gaseous nitrogen?

• N
• N₂
• N₃
• N₄

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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-LS2-1

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Nitrification happens in the ______

• Air

• Soil

• Ground Water

• Plants

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Nitrogen fixation is what happens when

• Nitrogen gas gets broken apart and the N atoms are put into a form (NH3 or NH4) that can be used by other bacteria.

• NH3 and NO2 is changed by bacteria into a more useful chemical form by adding oxygen atoms (NO3).

• NO3 is taken up by plant tissue with their root systems, and then the nitrogen is used to make amino acids.

• Animals eat the plant structures, absorbing the amino acids through digestion.

• Animals die and excrete waste, leaving NH4 that goes into the soil.

Tags

NGSS.MS-LS2-1

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Nitrifying bacteria are bacteria that do chemical reactions where

• Nitrogen gas gets broken apart and the N atoms are put into a form (NH3 or NH4) that can be used by other bacteria.

• NH3 and NO2 is changed by bacteria into a more useful chemical form by adding oxygen atoms (NO3).

• NO3 is taken up by plant tissue with their root systems, and then the nitrogen is used to make amino acids.

• Animals eat the plant structures, absorbing the amino acids through digestion.

• Animals die and excrete waste, leaving NH4 that goes into the soil.

Tags

NGSS.MS-LS2-1

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