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Unit 11

Weather and Climate

TermDefinition
water cycle ​Movement of water between the atmosphere, land, oceans, and even living things makes up the water cycle.
evaporation evaporation occurs when liquid water changes into water vapor.
transpiration release of water vapor into the air by plants is called transpiration.
sublimation When solid water changes directly to water vapor without first becoming a liquid, it is called sublimation.
condensation condensation is the change of state from a gas to a liquid.
precipitation Precipitationis any form of water that falls to Earth from clouds.
weather ​Weather is the condition of Earth’s atmosphere at a certain time and place.
humidity The amount of water vapor in the air is called humidity.
relative humidity Relative humidity is the amount of water vapor in the air compared to the amount of water vapor needed to reach saturation.
dew point The dew point is the temperature at which more condensation than evaporation occurs.
air pressure Air pressure is the force of air molecules pushing on an area.
wind Wind is air that moves horizontally, or parallel to the ground.
visibility visibility is a measure of the transparency of the atmosphere
air mass An air mass is a large volume of air in which temperature and moisture content are nearly the same throughout.
front A boundary, called a front, forms between the air masses.
jet stream Long-distance winds that travel above global winds for thousands of kilometers are called jet streams.
thunderstorm A thunderstorm is an intense local storm that forms strong winds, heavy rain, lightning, thunder, and sometimes hail.
lighting Lightning is an electric discharge that happens between a positively charged area and a negatively charged area.
thunder the sound created by the rapid expansion of air along a lightning strike.
hurricane A hurricane is a tropical low-pressure system with winds blowing at speeds of 119 km/h (74 mi/h) or more
storm surge When a hurricane moves into a coastal area, it also pushes a huge mass of ocean water known as a storm surge.
tornado A tornado is a destructive, rotating column of air that has very high wind speeds and that is sometimes visible as a funnel-shaped cloud.
sinkhole Sinkholes are holes in the ground that form when a cave collapses.
wildfire Wildfires are uncontrolled fires burning in natural areas.
muck fire Like dry grass and trees, muck can be ignited easily by a lightning strike. When muck is ignited, a muck fire starts.
climate describes the weather conditions in an area over a long period of time.
latitude Latitude is the angular distance in degrees north and south from the equator.
topography The surface features of an area combine to form its topography.
elevation Elevation refers to the height of an area above sea level.
surface currents The currents on the surface of the ocean are called surface currents.
Created by: user-1855256
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