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Weather Vocab

Density The degree of compactness of a substance. Cold air is more dense than warm air.
Humidity A quantity representing the amount of water vapor in the atmosphere or a gas. Humid air is more moist than dry air.
Condensation Water that collects as droplets on a cold surface when humid air is in contact with it. The process of becoming more dense, in particular. Condensation is when rain comes.
Low Pressure A low-pressure area, or low, is a region where the atmospheric pressure at sea level is lower than that of surrounding locations. Low pressure is often warm.
High Pressure A high-pressure area is a region where the atmospheric pressure at the surface of the planet is greater than its surrounding environment. High Pressure areas are often cold.
Cold Front The boundary of an advancing mass of cold air. Colds fronts generally bring a short period of heavy rain, and later bring cold weather.
Warm Front The boundary of an advancing mass of warm air, in particular the leading edge of the warm sector of a low-pressure system. Warm fronts generally bring warm, moist, rainy days.
Stationary Front A stationary front is a boundary between two different air masses, neither of which is strong enough to replace the other.
Occluded Front a composite front formed when a cold front overtakes a warm front and forces it aloft.
Weather Map a map showing the principal meteorological elements at a given time and over an extended region.
Isobar A line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period.
Created by: s0905971