Draw a picture that represents yesterdays weather…. (You have 30 seconds!).
WEATHER. Which elements of weather can you pick out in the next slide? In 5 seconds or less….
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Transcript of WEATHER. Which elements of weather can you pick out in the next slide? In 5 seconds or less….
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WEATHER
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Which elements of weather can you pick out in the next slide?
In 5 seconds or less….
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Weather is simply the state of the atmosphere
That means that the weather has everything to do with the
atmosphere….and the atmosphere has everything to do with weather..
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So to understand weather, we must understand the
atmosphere
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What is the atmosphere?
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The atmosphere is the layer(s) of gases that surrounds the earth. It is like an invisible
blanket that wraps around the planet
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Another way to describe the atmosphere is like
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AN OCEAN
OF AIR
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If the atmosphere is like an ocean of air. Where are we in
that ocean?
At the bottom…
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Some gases in the atmosphere are:
Nitrogen
Oxygen
Argon
Carbon Dioxide
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What do these gases make?…
AIR
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These gases are floating around in the atmosphere
around us…
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What keeps those molecules in the atmosphere?
Why don’t they fly off into
space????
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Gravity!
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If gravity is holding all of this ‘sea of air’ in place,
where will the atmosphere be the most dense?
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Imagine that all of the atmosphere is pushing ‘down’
So, we will feel the most weight of the atmosphere closer to the
earth’s……
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SURFACE
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Temperature
is how hot or cold the atmosphere is
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What determines the temperature?
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The temperature of a place is affected by the amount of the
sun’s rays (solar radiation) that reaches the earth’s surface
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REACHES THE EARTH’S SURFACE
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The earth is not warmed by the direct heating of the atmosphere by the
sun’s rays
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So we know that the atmosphere prevents some solar radiation (sun’s rays) from reaching the
earth’s surface
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So what would happen if the sun’s rays had to travel through more
atmosphere?
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What about if the sun’s rays were pointed at an angle?
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Did you know the earth is tilted?
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Look at the higher latitudes.
What happens to the sun’s rays?
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Look how much of the atmosphere the rays have to go through at the higher
latitude
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