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Final Essay

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1. Describe and give examples of the various ways that heat can be transported in the atmosphere. In the atmosphere, heat can be transported by conduction, convection and radiation. Conduction is the transfer of heat from molecule to molecule that is directly contacting each other (Ahrens, C. 2015, p. 33). Heat will be transferred by conduction will flow from warmer to cooler regions. Convection is a mass movement of liquid and gases as they transfer heat. Warmer air or liquid, as it rises, is replaced by cooler liquid or gas. This results in a continuous convective circulation pattern. A radiator as it puts warm air out from the top and draws cooler air in at the bottom is an example of convection. Another example of convection is a hot air …show more content…

What causes air pressure? Air pressure is defined as “The pressure exerted by the mass of air above a given point, usually expressed in millibars (mb), inches of mercury (Hg) or in hectopascals (hPa)” (Ahrens, C. 2015, p. 496). Is there air pressure on the moon? Air pressure is the weight or pressure of air molecules being pulled down by the force of gravity, there is not enough gravity on the moon to sustain an atmosphere therefore, there is no air pressure on the moon.
3. What are the principal gaseous components of the earth's atmosphere? The average principal gaseous components of the earth’s atmosphere, up to an altitude of 25 km, are nitrogen at 78.08% and oxygen at 20.95%, much lesser amounts of gases in the atmosphere are water vapor at up to 4%, argon at 0.93%, carbon dioxide at 0.040% and other gases at even smaller amounts (Ahrens, C. 2015, p. 6). Where do scientists believe these gases came from? There are differing theories, one theory is that some scientists believe that gases gradually built up from the molten rock and volcanoes and released the gasses into the air. Another theory, based upon isotopic samples matching that of meteorites, is that the gases are “possibly from a late bombardment of gas and water rich materials similar to comets” (University of Manchester

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