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BJ Geography chapter three


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The prevailing winds that blow over the middle latitudes.
Precipitation that occurs as an air mass moves upward over mountains or mountain ranges.
orographic precipitation
Region with plenteous grass but few trees.
Climate chart.
Hot, rising air.
low pressure
The amount of water vapor in the air.
The meeting of warm and cold air masses.
The rate of decrease in temperature with increase in altitude.
lapse rate
The vegetation of tropical areas with a long dry season; displays grasses and scattered trees that are drought resistant.
Cold, heavy air.
high pressure
Basic path of water flow within an ocean.
ocean current
The plants in an area or region.
A rolling grassland area, particularly of Central Asia and eastern Europe.
The point at which water begins condensation.
dew point
A large geographic area that contains a particular group of plants and animals and has a specific physical environment
The vegetation regions of cold climates displaying little vegetation other than mosses, lichens, and similar small plants.
A slight warming of the water over a wide region of the Pacific that periodically affects the earth's climate.
El Nino
A tree that produces its seed in a cone.
A large area of air that has a similar temperature and moves together.
air mass
A circular pattern of ocean currents.
Any form of moisture that falls from the atmosphere, such as rain, hail, snow, and sleet.
Precipitation that occurs when an air mass warms and rises rapidly, then cools to the dew point as it gains altitude.
convection precipitation
Ground that remains permanently frozen even though the top few inches may thaw during a short summer.
The rotation of the earth around its axis that greatly influences wind direction.
Coriolis effect
Plants that shed their leaves before a period of dormancy.
The common northeasterly winds of tropical regions.
trade winds
The process of water changing into water vapor.
A cycle whereby water evaporates from oceans, lakes, the soil, and so on, to form clouds that in turn precipitate water to the earth.
hydrologic cycle
The usual temperature, precipitation, and wind conditions of a certain area.
The changing of water vapor into liquid.
Water that has seeped into the earth's crust and is held below the surface of the earth.
ground water
Lacking moisture
The time from the last killing frost of spring until the first killing frost of fall.
growing season

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