Water Cycle
Nitrogen Cycle
Grab Bag!
Phosphorus Cycle
Carbon Cycle
100

Water falling to the earth from condensed clouds is known as -------------------

 Precipitation.

100

Why is atmospheric nitrogen needs to be "fixed"?

because "we can't use it".

100

The process by which nitrates in the soil is converted back to atmospheric nitrogen gas is known as ------------------.

Denitrification

100
The majority of the phosphorus in the world is stored in what?
What is rocks.
100
Which biological process do plants use to take in carbon dioxide from the atmosphere and get energy?
What is photosynthesis.
200

A permeable rock that conatins large quantities of water is known as -----------

Aquifer.

200
Who "fixes" the nitrogen into a form that we can use?
What is bacteria (either in the soil or in the roots of legumes).
200

What are nitrogen fixing plants called?

Legumes or leguminous plants.

200

True or false?

Phosphorus is the slowest biogeochemical cycle.

True.

200
Name two ways that carbon is released into the atmosphere using biological processes?
What is cellular respiration and decomposition.
300
How does ocean/lake water return to the atmosphere?
What is evaporation.
300

How do carnivores get nitrogen? 

by consuming other animals that have the nitrogen".

300

What are the four important biomolecules needed for life activities? 

Carbohydrates

Proteins

Fats

Nucleic acids

300

What must happen to the rock in order for plants to absorb the phosphorus within them?

What is break down into soil.

300
Humans have contributed more carbon to the carbon cycle by doing what?
What is burning fossil fuels.
400
Which process within the water cycle is considered "biological"?
What is transpiration.
400
Planting legumes in a field the year before a crop will do what to the productivity of your field?
What is "increase productivity because there is more nitrogen in the soil".
400

---------------- is an example of nitrogen fixing bacteria that live on plant roots.

Rhizobium

400

How do plants obtain phosphorus?

By absorbing phosphates in the soil through their roots.

400

An example for carbon source is ---------------

Humans

automobiles

factories.

Burning fossil fuels.

500

The process by which vater vapor changes to liquid water is known as ---------------------.

Condensation.

500
Nitrogen is used in the body to make what?
What is DNA and proteins.
500

Which other natural process fixes atmospheric nitrogen into the soil other than the nitrogen fixing bacteria?

Lightning.

500

Phosphorus is used not only in energy and in cell processes (like enzymes and transport), but also in what?

DNA and RNA.

500

Which is an example of carbon sink?

Humans

plants

automobiles

Plants

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