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100

processes that emit carbon into the atmosphere.

Carbon Sources

100

The condition of Earth's atmosphere at a particular time and place.



Weather

100

the angular distance of a place north or south of the earth's equator, or of a celestial object north or south of the equator.

Latitude

100

the surface features of an area.

Topography

100

height above sea level

Elevation

200

the currents on the surface of the ocean


Surface Currents

200

a long period of cooling during which ice sheets spread beyond the polar regions.

Ice Age

200

process by which gases in the atmosphere absorb and radiate energy as heat back to the Earth.

Greenhouse effect

200

The removal of trees faster than forests can replace themselves.

deforestation

200

The condition of Earth's atmosphere at a particular time and place.

Weather

300

A gradual increase in average global temperature.

Global Warming

300

The super-continent that existed 200 million years ago

Pangaea

300

an international agreement to reduce greenhouse gas emissions

Kyoto Protocol

300

tiny, solid particles suspended in air or water

Particulates 

300

ocean temperatures are higher than normal in the tropical pacific

El Nino

400

ocean temperatures colder in eastern tropical pacific

La Nina

400

dark areas of the sun that disappear and appear about every 11 years

Sunspots

400

a change or the process of change by which an organism or species becomes better suited to its environment. 

Adaptation

400

Horizontal movement of air from high to low pressure

Wind

400

rain, snow, sleet, or hail that falls to the ground.

Precipitation

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