Nitrogen Cycle!

How animals get the nitrogen they need

• from the air they breathe
• from the water they drink
• from the food they eat
• from the Sun

Tags

NGSS.MS-LS2-3

How nitrogen is "fixed" into useable form for plants

• only through action of bacteria
• only through lightning
• through action of bacteria & lightning
• through photosynthesis

Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere

• bacteria
• plants
• animals
• producers

Tags

NGSS.MS-LS2-3

Gas that makes up almost 80% of Earth's atmosphere

• oxygen
• carbon dioxide
• nitrogen
• hydrogen

Plants and animals cannot use nitrogen directly from the air.

• True

• False

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

• nitrification
• ammonification
• nitrogen fixation
• assimilation

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

• nitrification
• ammonification
• nitrogen fixation
• assimilation

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

• ammoniafication

• nitrogen fixation

• denitrification

• nitrification

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

Nitrogen is essential for living organisms to make:

• Lipids
• Carbohydrates
• Proteins
• Fats