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33 Cards in this Set
- Front
- Back
Revolution
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one trip around the sun
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Equinox
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daylight and nighttime hours are equal. In the northern hemisphere it represents the first day of spring.
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Solstice
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The longest day of sunlight. The the beginning of summer in the N. Hemisphere.
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Prevailing Wind
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Global winds blow in fairly constant patterns.
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Doldrums
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At the Equator, global winds are diverted north and south, leaving a narrow, generally windless band
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Current
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Cold and warm streams of water that move through Oceans
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Precipitation
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rain, snow, and hail
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Windward
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the rising air cools and releases most of its moisture on the windward side
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Leeward
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opposite side of the mountain from the windward side
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Rain Shadow
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The hot, dry air produces little precipitation in an effect known as a rain shadow. (leeward side)
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Natural Vegetation
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the plant life that grows in an area where the natural enviroment is unchanged by human activity
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Oasis
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an area of lush vegetation
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Deciduous
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trees that have broad leaves that change color and drop in the autumn
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Mixed Forest
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both kind of trees. (deciduous and coniferous)(found in west coast climates)
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Chaparral
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thickets of woody bushes and short trees (by the Mediterranean sea)
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prairie
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inland grasslands, and forests of evergreen and deciduous trees
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permafrost
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permanently frozen subsoil
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taiga
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russian term for the vast subartic forest, mostly evergreens, that covers much of Russia and Siberia
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Timberline
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the altitude above sea level at which timber ceases to grow
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Hypothesis
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scientific explanation
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Smog
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a visible chemical haze in the atmosphere that endangers people's health
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Subsistence Farming
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producing just enough food for a family or village to survive
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Population Distribution
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the pattern of population in a country, a continent, or the world
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Population Density
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the average number of people in a square mile or square kilometer
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Tornado
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a localized, violently destructive windstorm occurring over land, esp. in the Middle West, and characterized by a long, funnel-shaped cloud extending toward the ground and made visible by condensation and debris
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Hurricane
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a violent, tropical, cyclonic storm of the western North Atlantic, having wind speeds of or in excess of 72 mph
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Tsumani
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an unusually large sea wave produced by a seaquake or undersea volcanic eruption.
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Pollution
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the exisistence of impure, unclean, or posionous substances in the air, water, or land
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Civilation
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an advanced state of human society, in which a high level of culture, science, industry, and government has been reached.
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History
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the branch of knowledge dealing with past events
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Prehistory
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human history in the period before recorded events, known mainly through archaeological discoveries, study, research, etc.; history of prehistoric humans
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Cultural Hearth
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a center where cultures developed and from which ideas and traditions spread outward
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Cutural Diffusion
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the spread of new knowledge and skills from onw culture to another
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