Air Pressure QUESTIONS HELP!?

Question

1.) Air pressure is caused by the mass of the air being pulled down by the __________of the earth over a particular object or the surface.

(would this be friction?)

2.) Two of the items in the list below are factors that affect air pressure. Which two?

a) temperature

b)elevation

c.)wind speed

d.) nearness to a body of water

3.) Winds blow from areas of high pressure into areas of low pressure.

True

False

4.) Local and global winds are set in motion by air moving in convection cells. Describe the motion of air in a convection cell. Please include direction of air movement and relative temperature of the moving air.

Answer 1

1) gravity? (i'm not sure)

2) a and b

3) TRUE

4) in the southern hemisphere air moves in a clockwise direction and vice versa in the northern hemisphere

Answer 2

(1) Gravity

(2) (a) and (b)

(3) True

(4)Sea-breeze in coasal stations is an example of local winds.During day time land area is heated more than the adjacent sea surface.The air above the heated surface is also heated and rises as convection current.This rising air is replaced by cold air from the sea surface which constitues the sea-breeze.The air circulation is completed by a reverse flow of wind from the land to sea at higher levels.

Hadley cell is an example of global wind.Hot air rises as convection current at the equator and travels north and south.When it reaches latitude 30 degrees north and south,known as horse latitudes,it sinks,creating high-pressure areas.Some of this air travels back towards equator,and these flows are known trade winds.This constitutes a global air circulation called Hadley cell.