AQA Environmental science Nitrogen Cycle

Nitrogen is important in living things as it is a component of: (select two)

• Carbohydrates

• Proteins and Amino acids

• Lipids

• DNA

Tags

NGSS.MS-LS2-3

What is the largest reservoir of Nitrogen?

• Atmosphere

• Ocean

• Rocks and minerals

• Living organisms

The process where nitrogen gas is converted from the atmosphere into ammonia is called...

• ammonification

• nitrification

• denitrification

• nitrogen fixation

The process where ammonia is converted to nitrites and then to nitrates is called...

• ammonification

• nitrification

• denitrification

• nitrogen fixation

The type of organisms that can convert amino acids in dead organisms back into ammonia in the soil

• detritivores

• decomposers

• plants

• animals

What type of process is most likely to occur in the soil when there is low oxygen?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

Tags

NGSS.HS-LS2-3

Excess nitrogen running off from fields into waterways can lead to...

• soil erosion

• death of soil biota

• death of detritivores

• eutrophication

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Nitrogen in the atmosphere can be fixed into the soil by... (select 3)

• lightning

• Azotobacter (free living bacteria in the soil)

• Rhizobium (mutualistic bacteria in roots)

• Pseudomonas (free living bacteria in the soil)

Tags

NGSS.MS-LS2-3

Nitrogen in the atmosphere can be fixed through an industrial process called...

• The dagobah process

• The Haber process

• The mos eisley process

• The Hoth process

Tags

NGSS.MS-PS1-3

Process where nitrogen can leave soils through excess water...

• Leaching

• ammonification

• decomposition

• root absorption

Tags

NGSS.MS-LS2-3