Soil and Water Retention
How does pressure at the core of the Earth effect the
temperature of the core?
Have you ever noticed that when someone is boiling water (for pasta)
or maybe making stew or cooking rice, that they will put a lid on
the pot for a while? This is done for two reasons, so that the water
does not evaporate quickly as steam, and also so that the trapped
steam can build up and pressure increases. With an increase in
external pressure, the water will now boil at a higher temperature,
higher temperatures mean that the food will cook faster.
So it is with the core of the Earth - although we are not cooking
anything there. Because gases have nowhere to go, pressure builds
up, the higher pressure causes the temperature to go up higher than
if there were little atmospheric pressure.
Greg (Roberto Gregorius)
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Update: June 2012