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Author Question: What is air pressure, and how does it vary with temperature? What will be an ideal ... (Read 23 times)

joe

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on: Jul 15, 2018
What is air pressure, and how does it vary with temperature? What will be an ideal response?

Question 2

Briefly describe the four main dune types and how they differ from each other? What will be an ideal response?


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Benayers

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Reply #1 on: Jul 15, 2018
Answer to Question 1

Air pressure is the density of air exerted on its surroundings. When air is heated, it expands and rises,
reducing its mass for a given volume and causing a decrease in air pressure. When air is cooled, it
contracts, and air pressure increases



Answer to Question 2

Barchan dunes are crescent-shaped dunes whose tips point downwind. They form in flat, dry areas
with little vegetation, limited sand, and nearly constant wind direction. Longitudinal dunes are long,
parallel ridges of sand aligned parallel to the direction of the prevailing winds; they form where the
sand supply is somewhat limited. Transverse dunes form long ridges perpendicular to the prevailing
wind direction in areas with abundant sand and little or no vegetation. Parabolic dunes are common in
coastal areas with strong onshore winds and a partial vegetation cover.



joe

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Reply 2 on: Jul 15, 2018
Thanks for the timely response, appreciate it

robbielu01

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Reply 3 on: Yesterday
Wow, this really help

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