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Weather

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by

Carrie Schneider

on 6 November 2013

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Transcript of Weather

Weather
LEQ Number 1
How does the Sun's energy
impact weather
on Earth?
What is weather?
Weather is atmospheric conditions at a given time and place.
Sublimation and
Deposition in the Water Cycle
Sublimation is the conversion between the solid and the gaseous state of matter, with no intermediate liquid stage.

An example of sublimation is the process of snow and ice changing into water vapor in the air without first melting into water.

The opposite of sublimation is "deposition", where water vapor changes directly into ice—such a snowflakes and frost.
Air Movement
Temperature
The average amount of energy motion in the molecules of a substance.
Dew Point
The temperature at which condensation begins.
Air Pressure
A force that is the result of the weight of a column of air pushing down on an area.
Wind direction and speed
The horizontal movement of air from an area of high pressure to an area of lower pressure.
Humidity
A measure of the amount of water
vapor in the air.
Precipitation
Any form of water that falls from clouds
and reachs Earth's surface.
Coriolis Effect
The way Earth's rotation makes winds in the Northern Hemisphere curve to the right and the winds in the Southern Hemisphere curve to the left.
Jet Stream
Bands of high-speed winds about 10 km above Earth's surface. The movement of air in the jet stream can create low pressure areas where storms can develop and then the jet stream can steer these storms across an area.
High and
Low Pressure
Systems

High Pressure: air sinks down from above and becomes warm. The air is stable and the weather will be typically dry and free of clouds. Winds blow clockwise and outward.
Low Pressure: Warm air rises from Earth's surface. As the rising air cools, clouds will begin to form. The instability of the air will produce clouds with rain shower. Winds blow counterclockwise and inward.
Full transcript