Cycles of Matter

What are the two processes in the carbon cycle?

• photosynthesis and nitrogen fixation

• photosynthesis & respiration

• respiration and the water cycle

• photosynthesis

How do we get nutrients in our soil?

• respiration

• water cycle

• decomposers break down dead plants and animals

• photosynthesis

What effect do plants have on the carbon cycle?

• they absorb carbon dioxide and reduce the amount of carbon in the air.

• it does not effect plants

• respiration

• they release carbon into the atmosphere

What converts nitrogen gas to nitrates in the nitrogen cycle?

• bacteria

• the soil

• the air

• animals

When water is released from the leaves of trees during the water cycle it is known as...

• run off

• infiltration

• condensation

• transpiration

In which process is nitrogen from the air changed into a form that plants can use?

• denitrification

• nitrification

• nitrogen saturaion

• nitrogen fixation

When water vapor in the air cools and changes back into a liquid form is called what?

• condensation

• precipitation

• evaporation

• nitrogen fixation

How do animals get carbon into their body?

• eating

• breathing

• running

• sleeping

Which process would NOT be found within the water cycle

• condensation

• precipitation

• nitrogen fixation

• evaporation

Which factor determines whether precipitation will be in the form of rain or snow?

• temperature

• wind

• air pressure

• humidity