Heating land and water
Sun's energy
Local winds
Tools
How air behaves
100
What happens to land temperatures when they are exposed to the sun's heat?
heats up quickly
100
This % of sun's energy is absorbed and reflected by clouds
What is 25%
100
Why do sea breezes occur?
The air above land becomes less dense, therefore has less pressure and rises. The air above sea is cold, dense and has high pressure. So the air moves from high pressure to low pressure (Or from the sea to the land).
100
This tool tells us the direction of wind
What is a wind vane
100
How do air molecules behave when they are warmed?
They spread out and become light. Therefore rise, have low pressure, and are low in density (one person in the square or a pingpong ball in water).
200
What happens to water temperatures when they are exposed to the sun's heat?
Heats up slowly
200
This % of sun's energy is absorbed by Earth's surface
What is 50%
200
When do land breezes occur?
During the night (when the sun is down)
200
This tool measures the speed of wind
What is an anemometer
200
Warm air molecules are:
Not so dense because they spread out and become light. Therefore they have low pressure.
300
What happens to land temperatures when the sun's heat it gone?
Cools down quickly, does not retain (hold on) heat well
300
This % of sun's energy is absorbed and reflected by air
What is 20%
300
When do sea breezes occur?
During the day (when the sun is up)
300
TRUE OR FALSE - A wind vane tells us where wind is coming from.
True
300
How do air molecules behave when they are cooled?
They come together and become tightly packed.Therefore sink, have high pressure and are high in density (the whole class in the square or a golf ball in water).
400
What happens to water temperatures when the sun's heat is gone?
Cools down slow, retains (holds on) heat well
400
The % of sun's energy that is reflected by Earth's surface
What is 5%
400
Why do land breezes occur?
The air above sea becomes less dense, therefore has low pressure and rises. The air above land is cold, dense and has high pressure. So the air moves from high pressure to low pressure. (or from land to sea)
400
Cool air molecules are
dense because they are tightly packed together and sink. Therefore they have high pressure.
500
Explain the difference between high and low pressure SYSTEMS.
HIGH PRESSURE SYSTEM results in clear skies because high pressure means high density. Therefore molecules compact together, sink and push away anything in its way. LOW PRESSURE SYSTEM results in cloudy or unsettled weather because low pressure means low density. Therefore molecules spread out and rise.
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