Water Cycle
Nitrogen Cycle
Carbon Cycle
Phosphorus Cycle
100

This process involves water vapor cooling and forming clouds.

Condensation

100

This type of organism converts nitrogen gas into forms plants can use.

Nitrogen-fixing bacteria

100

Plants absorb carbon dioxide through this process.

Photosynthesis

100

Phosphorus is released into the soil through this process

Weathering of rocks

200

Plants release water vapor through this process.

Transpiration

200

Nitrogen is returned to the atmosphere by this process.

Denitrification

200

This process releases carbon dioxide into the atmosphere from animals.

Respiration

200

Plants obtain phosphorus by doing this.

Absorbing it from the soil through assimilation

300

The term for water gathering in rivers, lakes, and underground reservoirs

Collection

300

How do animals obtain nitrogen?

Eating plants and other animals

300

Dead organisms that don’t decompose fully can turn into this over time.

Fossil fuels

300

What is the major way that the phosphorus cycle differs from other cycles?

It does not include the atmosphere

400

Name two ways water vapor enters the atmosphere.

Evaporation and Transpiration

400

Why is nitrogen fixation important?

Organisms cannot use free nitrogen

400

Combustion of fossil fuels impacts the environment by doing this.

Releasing excess carbon dioxide into the atmosphere and contributing to climate change

400

Why is phosphorus essential for living organisms?

It is an essential component of DNA, RNA, and ATP