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Describe How The Pressure And Temperature Changes Of The Atmosphere

608 Words3 Pages

Most people know the atmosphere begins at the earth’s crust and extends up but some do not know where the atmosphere ends and where outer space begins. Today I am going to examine the pressure and temperature changes of the atmosphere. Atmospheric pressure is the weight of the air above. The atmospheres pressure decreases as you migrate further away from earth and increases as you move towards earth surface. An example of a low atmospheric pressure is Mount Everest. No mountain climber would have survived climbing Mount Everest breathing natural air due to the thin atmospheric pressure of 314 millibars available for climbers to breathe. That’s is why mountain climbers who have climbed Mount Everest use supplemental oxygen. Evangelista Torricelli was one of the first scientists to discover atmospheric pressure and invented the mercury barometer which is an instrument used to measure atmospheric pressure (PBS). The barometer also monitored variations in atmospheric pressure. Standard altitude-pressure tables …show more content…

In the troposphere and mesosphere, temperature generally falls with increasing altitude, whilst in the stratosphere and thermosphere, temperature rises with increasing altitude (Weather and Climate). The lowermost layers is the troposphere and ranges from 8km at the poles to 16km over the equator (Weather and Climate). Most of the weather takes place in the troposphere. “Since temperature decreases with altitude in the troposphere, warm air near the surface of the Earth can readily rise, being less dense than the colder air above” (Weather and Climate). Air molecules can travel to the top of the troposphere and back down again in a just a few days which generates clouds and ultimately rain from the moisture within the air, and gives rise to much of the weather which we experience (Weather and

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