Resources
Atmosphere
Properties of Water
Carbon Cycle
Nitrogen Cycle
100

Any natural materials that are used by humans such as water, petroleum, minerals

What are natural resources?

100

The layers of gas that surround the Earth

What is the atmosphere?

100

A molecule with opposite charges on different ends 

What is a polar molecule?

100

The chemical backbone of life on Earth

What is carbon?
100

The process of converting atmospheric nitrogen into a usable form

What is nitrogen fixation?

200

These can be replaced relatively quickly by natural processes

What are renewable resources?

200

The lowest, densest layer of the atmosphere

What is the troposphere?

200

The property of water that allows it to stick to itself

What is cohesion?

200

Where carbon spends most its time (waiting)

What are carbon sinks?

200

The absorption of nutrients by plants to build tissues

What is assimilation?

300

These form at a much slower rate than they are consumed

What are nonrenewable resources?

300
Where the ozone layer is located

What is the stratosphere?

300

The property of water that allows it to stick to other materials?

What is adhesion?

300

The main drivers of the biological or "fast cycle" of carbon

What are photosynthesis & cellular respiration?

300
Excessive nutrients in water causing algal blooms and oxygen depletion

What is eutrophication?

400

When a large fraction of a resource has been used up

What is depletion?

400

The coldest layer of the atmsphere

What is the mesosphere?

400

The effect when cohesion and adhesion work together

What is capillary action?

400

The form that carbon takes when it dissolves into seawater

What is carbonic acid?
400

The process by which bacteria convert nitrates into the soil back into nitrogen gas

What is denitrification?

500

Trees, sunlight, wind, and water are examples

What are renewable resources?

500
Where the Aurora occurs

What is the thermosphere?

500

The amount of heat required to raise the temperature of a substance

What is specific heat?

500

Where carbon is stored in the geosphere (the largest carbon reservoir). 

What are fossil fuels?

500

In biological fixation of nitrogen, these play the most important part

What are specialized bacteria?

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