Show:
Air Pressure 1
Air Pressure 2
Wind
Local Winds
Global Winds
100
What is the density formula?
Density = Mass / Volume
100
What tool is used to measure air pressure?
A barometer
100
What is wind?
The horizontal movement of air from an area of high pressure to an area of low pressure.
100
Define local winds.
Winds that blow over short distances.
100
What are global winds?
Winds that blow steadily from specific directions over long distances.
200
What is pressure?
Pressure is the force pushing on an area or surface.
200
What are the three properties of air?
Mass, Density, and Pressure
200
What tool is used to measure wind speed?
Anemometer
200
What are monsoons?
Sea and land breezes over a larger region that change direction with the seasons.
200
How are global winds produced?
By the movement of air between the equator and the poles.
300
How much oxygen is in air at the top of a mountain?
21%
300
What are the two major differences between aneroid and mercury barometers?
Mercury barometers use a liquid and are larger and not portable. Aneroid barometers do not use a liquid and are smaller and portable.
300
What is wind-chill factor?
Increased cooling caused by the wind.
300
What causes local winds?
Unequal heating of Earth's surface within a small area.
300
Explain the Coriolis Effect.
The way Earth's rotation makes winds curve. In the Northern Hemisphere they curve to the right and in the Southern Hemisphere they curve to the left.
400
What is the relationship between temperature and density. Explain.
When temperature increases, density decreases. When temperature increases, the particles speed up and spread apart. There are less particles in a given space so the density is less. The opposite happens when temperature decreases.
400
What is the relationship between pressure and density?
When pressure increases, density increases. When pressure decreases, density decreases.
400
Explain jet streams.
Jet streams are bands of high-speed winds about 10 kilometers above Earth's surface that blow from west to east. Planes flying against the jet stream (west) will have slower flights than planes flying with the jet stream (east).
400
Explain a land breeze in detail.
Land breezes happen at night. The land cools off faster than the water because it has a lower specific heat. This makes the temperature above the land colder than the temperature above the water. The lower temperature over the land gives it a higher density and pressure. Wind always blows from high pressure (land) to low pressure (water). This is a land breeze because it comes from the land.
400
What are the two calm areas without a lot of air movement called?
Horse latitudes and Doldrums
500
What is the relationship between altitude and the density of air?
At a higher altitude, the density of air is lower. At a lower altitude, the density of air is higher.
500
What is the relationship between altitude and pressure?
When you are at a higher altitude, the pressure decreases. When you are at a lower altitude, the pressure increases.
500
What causes ALL winds?
Differences in air pressure.
500
Explain a sea breeze in detail.
Sea breezes happen during the day. The land warms up faster than the water because it has a lower specific heat. This makes the temperature above the water colder than the temperature above the land. The lower temperature over the water gives it a higher density and pressure. Wind always blows from high pressure (water) to low pressure (land). This is a sea breeze because it comes from the water.
500
Name the three major wind belts.
Polar easterlies, Prevailing westerlies, Trade winds