the condition of Earth's atmosphere at a particular time and place
Overall weather in an area over a long period of time
an imaginary line that passes through Earth's center and its North and South Poles
a measure of how hot or cold something is
Earth's yearly orbit around the Sun
the time when day and night are of equal length
shortest and longest day of the year
trapping of heat by the atmosphere
a rise in average global temperatures
dry area found on the leeward side of a mountain range
a vast treeless plain in the arctic regions between the ice cap and the tree line
a treeless grassy plain
a fertile place in a desert where there is water and vegetation
a steady flow (usually from natural causes)
plant life that grows in a certain area if people have not changed the natural environment
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