Nutrient Cycling

What are the four most important materials needed by living organisms?

• water, carbon, oxygen, nitrogen
• water, food, oxygen, carbon
• water, carbon, nitrogen, phosphorous
• water, carbon, food, phosphorous

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• rain

• fungi

• car exhaust

How is nitrogen "fixed" into a usable form for plants?

• Through action of bacteria only

• Through lightning only

• Through action of bacteria and lightning

• Through photosynthesis

Tags

NGSS.MS-LS2-3

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

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• nitrogen composition

• nitrogen fixation

• ammonia

• denitrification

What is the formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

• Assimilation

• Fixation

• Ammonification

• Denitrification

Tags

NGSS.MS-LS2-3

According to this diagram, plants absorb

• nitrates

• nitrogen fixing bacteria

• animals

• decomposers

Tags

NGSS.MS-LS2-3

What is the process where plants use nitrates to grow?

• Nitrogen Fixation

• Ammonification

• Assimilation

• Nitrification

Tags

NGSS.MS-LS2-3

What process converts nitrogen gas into a biologically useful (fixed) form?

• Respiration

• Assimilation

• Denitrification

• Nitrogen fixation