​ ​ ​ (a)   is the conversion of soil Nitrogen (NO3) into Nitrous oxide (N2O) gas which returns to the ​ (b)   .

• Denitrification
• atmosphere
• soil
• Assimilation
• Nitrification

Tags

NGSS.MS-LS2-3

​ ​ (a)   is when bacteria, microbes, and other decomposers convert waste and dead biomass into NH3 and return it to the ​ (b)   .

• Ammonification
• soils
• Nitrification
• atmosphere
• Assimilation

Tags

NGSS.MS-LS2-3

Click the blank that labels Assimilation.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

​ (a)   is the conversion of NH4 into nitrite (NO2) & then nitrate (NO3) by ​ (b)   .

• Nitrification
• soil bacteria
• Denitrification
• Assimilation
• plants
• animals

Tags

NGSS.MS-LS2-3

What is the main nitrogen resevoir?

• ocean

• atmosphere

• soil

• plants

True or False: Nitrogen resevoirs hold nitrogen for a relatively short period of time compared to the carbon cycle.

• True

• False

Tags

NGSS.MS-ESS2-1

NH3 gas in the atmosphere can cause _________.

• sea level rise

• lung irritation

• increased average global temperatures

• acid precipitation

Tags

NGSS.MS-LS2-4

Nitrates are added to (a)   and are used in ​ (b)   .

• synthetic fertilizer
• agriculture
• roads
• infrastructure
• bacterial fixation

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-5

Label the steps in the nitrogen cycle.

b

c

d

a

Assimilation

Ammonification

Nitrification

Denitrification

Tags

NGSS.MS-LS2-3

Which molecular formula is atmospheric nitrogen?

• NH4

• NO2

• N2

• NO3

• NH3