Carbon Cycle
Phosphorus Cycle
Water Cycle
Nitrogen cycles
Oxygen Cycle
100

The process which plants use CO2 to make oxygen and sugar.

What is photosynthesis?

100

Too much phosphorus in water can lead to this.

What is plant overgrowth?

100

Another name for the water cycle.

What is the hydrologic cycle?

100

Percentage of our atmosphere that is nitrogen gas.

What is 78%?

100

Most available oxygen is made by this organism found on the ocean’s surface. 

What is phytoplankton?

200

The process in which animals use oxygen and make more CO2.

What is cellular respiration?

200

Phosphorus is not found in the free state in nature, it is mostly contained in these 2 sources.

What are rocks and minerals?

200

The process that turns water vapor into liquid, which causes the formation of a cloud.

What is condensation?

200

Higher organisms use nitrogen to make these.

What are proteins?

200

Process responsible for most of the available oxygen in the atmosphere.

What is photosynthesis?

300

More CO2 is released in the atmosphere today than in the past because of this.

What is the burning of fossil fuels?

300

Phosphorus is essential to life as it is part the important chemicals that make up your genetic code AKA.

What is DNA?

300

 When water evaporates from a leaf, this process is called.

What is transpiration?

300

These special bacteria can directly use nitrogen in our atmosphere and “fix” it so other organisms can benefit.

What are nitrogen-fixing?

300

Some oxygen is made in the atmosphere, when sunlight breaks this down.

What is water?

400

Coal, oil and natural gas are examples of these.

What are fossil fuels?

400

In the phosphorus cycle, Phosphorus moves between these two areas of the ecosystem which are eaten by animals.

What is the soil and plants?

400

 When water leaves a body of water after it is heated, the process is called.

What is evaporation?

400

 Animal waste decay by the action of bacteria creates these 2 products rich in nitrogen, and useful for plants to use again.

What are ammonia and  nitrate?

400

 The Atmospheric oxygen layer that provides protection from harmful ultraviolet rays.

What is the ozone?  

500

Too much CO2 in the atmosphere may be responsible for this.

What is the Greenhouse effect?

500

Too many phosphorus-rich fertilizers have this kind of effect on the environment.

What is negative?

500

 When water falls from the sky, the process is known as.

What is precipitation?

500

Through this process bacteria in the soil can break down the ammonia into the gaseous form of nitrogen, which is not available for use by plants or animals.

What is Denitrifying?

500

The process which produces CO2 and water.

What is cellular respiration?