Air+pressure,+layers+of+the+atmosphere

=Air pressure, layers of the atmosphere= Air pressure is the force exerted by the weight of the air above air at certain altitudes. For example, the air pressure is higher at sea level than that at the top of Mt. Everest due to the amount of air above the air at sea level. As the altitude increases there is less air pressure making it harder to breathe. As someone goes up in altitude, the oxygen particles are less dense, which is why it is so hard to climb Mt. Everest without an oxygen tank. To measure air pressure, you need a barometer. A barometer is a tool that measures the air pressure at altitudes.

The main 4 layers of the atmosphere are the troposphere, stratosphere, mesosphere, and the thermosphere. Then there is the ionosphere. Most things in the planet live in the troposphere. It is the lowest section of the atmosphere. The average height of the troposphere is about 12 kilometers. This is the layer that where most weather happens. Temperature decreases as altitude increases in the troposphere. The stratosphere is the layer above the troposphere. The average height is around 38 kilometers high. The temperature is about the same as the top of the troposphere for about 20 kilometers. Then it gets warmer. This happens because of the ozone layer. The ozone layer absorbs most of the harmful UV rays from the sun. Thus this area is warm. Without the ozone layer, the earth would not be very inhabital due to the heavy radiation. The mesosphere is the next layer of the atmosphere. The height is about 30 kilometers. In this layer, the temperature decreases as it gets higher. Most meteoroids that enter the atmosphere burn up in the mesosphere. The final major layer is the thermosphere. The temperature increases rapidly as altitude increases. This happens because the gasses absorb some solar radiation and move very fast. A minor part of the atmosphere is the ionosphere. This is where molecules of nitrogen and oxygen lose electrons and become cations. One of nature's most amazing things happen in the ionosphere. This event is the northern lights.

The way the atmosphere is related to heat transfer is the fact that heat transfers between the layers so the Earth doesn't become too hot for life to not exist.

Conclusion: Air pressure is important for living things to live. The more air around the easier it is to breathe. The atmosphere is to keep the earth and its inhabitants safe from UV rays and other things.