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EESC 212 Lecture 9 Questions with Correct Answers
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EESC 212 Lecture 9 Questions with Correct Answers
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EESC 212 Lecture 9 Questions with Correct Answerswhat direction is the movement of air? Correct Answer-horizontal
how can we explain the direction and speed of wind? Correct Answer-
using newton's law of motion
what are the main forces that control the speed and direction of wind (4)? Correct Answer-pressure gradient (force of gravity)
coriolis force centrifugal force friction
how do pressure gradients form? Correct Answer-from differing atmospheric pressures horizontally across the atmosphere
define isobars Correct Answer-points of equal atmospheric pressure on weather maps
how can we determine areas of relatively high and low pressures at given altitudes? Correct Answer-by mapping isobars
what direction do winds resulting from pressure gradient forces alone blow across isobars? Correct Answer-perpendicular what causes low pressure? Correct Answer-as warm/ humid air rises, it oushes up on the air above it, lowering pressure below it
what causes high pressure? Correct Answer-as cold/ dry air sinks, it poushed down on the air below, causing high pressure
define pressure graient Correct Answer-is a change in pressure (P) over some horizontal distance (X)
when isobars are tight is the change in pressure big or small? Correct Answer-big
what causes the pressure gradient force (PGF)? which direction does it pull? Correct Answer-presence of a pressure gradient, pulls in the opposite direction of the PG
define coriolis effect Correct Answer-an apparent force in that the roation of the earth makes it appear that the direction of winds are deflected when they move in a meridional direction (N-S)
what does the coriolis force do to winds in the n hemi? in the s hemi? Correct Answer-right
left
what does the coriolis effects affect as they move across the globe? Correct Answer-apparent trajectory of air, water, airplanes, artillery
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