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33 Cards in this Set

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