Biogeochemical Cycles Flashcard

Front

Nitrogen fixation...

Back

Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

Front

How do animals get the nitrogen they need?

Back

From the food they eat.

Front

Nitrogen rich fertilizers and manure can cause water pollution.

Back

True

Front

How do plants get the nitrogen they need?

Back

from the soil or water in which they live

Front

What is the source of energy for the Water Cycle?

Back

Sun

Front

The process of water that is added to the atmosphere from plants is called

Back

Transpiration

Front

The water cycle has no beginning or end.

Back

True

Front

Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are part of which chemical cycle?

Back

The carbon cycle

Front

Which of the following is an example of human impact on the carbon cycle?

• The increased production of methane gases from cattle farms
• The burning of fossil fuels
• The cutting down of trees for lumber
• Driving automobiles
• All of the above

Back

All of the above

Front

How does the carbon in grass become part of a lion?

Back

The lion eats the grass