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Weather intro by Mrs Kester
Transcript of Weather intro by Mrs Kester
Barometer: an instrument that is used to measure changes in air pressure. Air pressure is measured in inches. Air pressure decreases as altitude increases. As air pressure decreases so does density (how tightly packed together molecules are). Layers of the Atmosphere:
There are four main layers of the atmosphere that are classified according to the changes in temperature. These layers are troposphere, the stratosphere, the mesosphere and the thermosphere. Troposphere: the inner, lowest layers of the atmosphere. This is where weather occurs. Stratosphere: the ozone layer that absorbs ultraviolet radiation. Mesosphere: middle layer of the atmosphere. Most meteoroids burn up in this layer, producing meteor trails. Thermosphere: the outer most layer of the atmosphere. There is no limit to this layer. Ionosphere: one layer of the thermosphere. Radio waves reflect back to Earth in this layer. The aurora borealis occurs in this layer. Exosphere: phone calls and television pictures often reach you by way of communications satellites that orbit Earth in this layer of the atmosphere. Bellringer:
Finish the questions from yesterday's class.