AP Environmental Science Nitrogen Cycle

The step in the nitrogen cycle where plants take up nitrate and use it to make biological molecules is:

• nitrification
• ammonification
• nitrogen fixation
• assimilation

Tags

NGSS.MS-LS2-3

The step in the nitrogen cycle where bacteria convert ammonia (NH₃) to nitrate (NO₃^-) is:

• nitrification
• ammonification
• nitrogen fixation
• assimilation

Tags

NGSS.MS-LS2-3

The process where some bacteria remove nitrate from the soil by converting it to nitrogen gas is:

• nitrification
• nitrogen fixation
• denitrification
• nitrification

Tags

NGSS.MS-LS2-3

What part of the nitrogen cycle deals with the conversion of nitrogen in waste products or dead organisms into ammonia?

• nitrification
• ammonification
• denitrification
• nitrogen fixation

Tags

NGSS.MS-LS2-3

What is the first step in the nitrogen cycle, in which gaseous nitrogen is converted into ammonia?

• nitrification
• ammonification
• denitrification
• nitrogen fixation

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

Nitrogen gas accounts for what percentage of the atmosphere?

• 55%
• 5%
• Less than 1%
• 78%

Nitrogen is essential for living organisms to make:

• Lipids
• Carbohydrates
• Proteins
• Fats

Tags

NGSS.MS-LS1-7

Biogeochemical cycles: 

• only include processes conducted by or within living organisms.
• describe the movement of water and other materials throughout the abiotic and biotic environment.
• only pertain to exchanges and interactions that occur within the atmosphere.
• are used to describe the attempts of humans to recycle various pollutants.

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Which of the following is a Nitrite?

• NO₃^-
• NO₂^-
• N₂
• NH₃

Which of the following is a Nitrate?

• NO₃^-
• NO₂^-
• N₂
• NH₃