Cycling of Matter - Nitrogen Cycle

Labelling

Complete the diagram using the options below.

Drag labels to their correct position on the image

Decomposition

Photosynthesis

Combustion

Carbon in the Atmosphere

Cellular Respiration

Fossil Fuels

Multiple Choice

The process in which nitrogen circulates and is recycled is called

• The nitrogen cycle

• The carbon cycle

• The water cycle

• The phosphorus cycle

Multiple Choice

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

Multiple Choice

Gas that makes up 78% of our atmosphere.

• Oxygen

• Nitrogen

• Hydrogen

• Carbon Dioxide

Multiple Choice

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

• bacteria

• rain

• fungi

• car exhaust

Multiple Choice

All plants have nitrogen fixing bacteria in their roots.

• True

• False

Multiple Choice

In the nitrogen cycle, what does label A in the diagram represent?

• Gas

• Clouds

• Carbon dioxide in the atmosphere

• Nitrogen in the atmosphere

Multiple Choice

Bacteria create a form of nitrogen that animals can use directly.

• True

• False

Multiple Choice

A correct path that nitrogen could take would be

• air -> animals -> plants -> bacteria

• animals -> air -> bacteria -> plants

• bacteria -> air -> plants -> animals

• air -> bacteria -> plants -> animals

Multiple Choice

The process that allows plants to use nitrogen

• assimilation

• denitrification

• fixation

• ammonification

Multiple Choice

According to this diagram, plants absorb

• nitrates

• nitrogen fixing bacteria

• animals

• decomposers

Multiple Choice

What is the formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

Multiple Choice

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

• nitrogen composition

• nitrogen fixation

• ammonia

• denitrification

Multiple Choice

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

Multiple Choice

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

• Assimilation

• Fixation

• Ammonification

• Denitrification

Multiple Choice

The biological transformation of ammonia or ammonium to nitrites and nitrates.

• ammonification

• denitrification

• nitrification

• nitrogen fixation

Dropdown

Nora noticed that after a heavy rain, the nearby pond had an unusual amount of algae. She learned in science class that excess fertilizers might enter into an aquatic ecosystem through

Select answer

Match

Match the following steps of the nitrogen cycle to how they move bacteria.

• Atmosphere to Geosphere

• Geosphere to Biosphere

• Biosphere to Geosphere

• Geosphere to Atmosphere

Nitrogen Fixation

Assimilation

Ammonification

Denitrification

• Nitrogen Fixation

• Assimilation

• Ammonification

• Denitrification