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Copy of Labyrinth (Template Source)

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eric barstow

on 10 January 2014

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Transcript of Copy of Labyrinth (Template Source)

mercury barometer
vocabulary words
Low Pressure Storms
how high-pressure systems create clear skies
Mercury barometer- A Mercury barometer is an instrument that is used to measure pressure by the weight of a column of mercury. It is designed as a mercury filled glass in which the height of the mercury column is the measure of air pressure. Mercury barometer, how does it work? The air pressure pushes down on the sides or the bottom of the mercury glass and pushes the mercury up the glass. the vacuum is another word for empty space or emptiness.
Warm weather brings low-pressure systems: warm air expands so there are less air molecules in the air around us. Low-pressure systems usually bring precipitation. Cool weather brings high-pressure systems:cooler air decreases in size,which means air molecules take up less space and become smaller.High-pressure systems usually bring little or no precipitation.
There is a giant high pressure blocking system off the Pacific Coast and you can see this very large storm, moving left to right in the following photo, has run smack into it. The near vertical part of the system shows how it has been stopped cold.

Air pressure
Air molecules are invisible , but they still have weight and take up space . Changes in temperature effect how many molecules are packed into the atmosphere . Warm weather brings low pressure system.
high-pressure and low-pressure system
Air pressure is the force per unit area exerted on surface by the weight of air above the surface. Air pressure is made of 78% Nitrogen, 21% oxygen.
In our experiment we are using air pressure to blow-up the balloon.
In the Northern hemisphere high pressure system winds spin clockwise to move the air from the center outward. More air is sucked down from the high part of the atmosphere to replace the air that flows out of the storm. The air warms up as it is pulled up and it expands, and clouds now disappear.
ozone layer-A layer that is in the stratosphere ( at exactly 20 miles) that contains a focus of ozone strong enough to block most of the ultraviolet radiation ( the suns harsh rays.)

density and air pressure-as altitude increases, air pressure and density ; air particles spread out more.

Air particles-Dust,smoke, and pollen; most are too small to see.
A low pressure system, or "low," is an area where the atmospheric pressure is lower than that of the area surrounding it. Lows are usually associated with high winds, warm air, and atmospheric lifting. Because of this, lows normally produce clouds, precipitation, and other bad weather such as tropical storms and cyclones.A cyclone can spread over a range of 500 miles.

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