0
When air is warmed up, its molecules move faster and faster and as a result they move further from each other. They still have the same mass, but they now occupy a larger volume. This means that its density is smaller.
The opposite when air is cooled off. The molecules slow down, get closer together, occupy a smaller volume and therefore its density is bigger.
When air is warmed up, it goes up. Once it's up there, is cools off and goes back down. Near the heated surface the air gets warmed up again, goes up, cools down, goes back down, and again and again.
That's called a convection cell.
Wiki User
∙ 11y ago
Anonymous
Wiki User
∙ 12y agoAir above a heated surface expands and rises.
When air is warmed up, its molecules move faster and faster and as a result they move further from each other. They still have the same mass, but they now occupy a larger volume. This means that its density is smaller.
The opposite when air is cooled off. The molecules slow down, get closer together, occupy a smaller volume and therefore its density is bigger.
When air is warmed up, it goes up. Once it's up there, is cools off and goes back down. Near the heated surface the air gets warmed up again, goes up, cools down, goes back down, and again and again.
That's called a convection cell.
Add your answer:
Earn +20 pts
How can the mass of a pile of snow decrease on a sunny day when the air temperature does not rise above zero degrees celsius?
When the sunlight strikes the snow, the surface of the snow is heated above the air temperature and some melting and evaporation occur.
What type of precipitation is caused by air being heated at the surface of the earth?
Convectional precipitation is the type of precipitation caused by air being heated at the surface of the earth. Convectional precipitation can fall anywhere on earth.
Why is there most air closer to the surface?
because warm air move upwards and cool air due to gravity move closer to the earth surface
What causes atmospheric air to be rapidly heated?
In the atmosphere, warm surfaces can heat the air above them. High pressure in the atmosphere is what causes the air to rapidly heat.
What do you think happens to the air above the land when it is heated?
when land is heated, the air above it also gets heated, which makes it to start rising. This is due to the fact dat hot air is lighter dan cold one. this gives rise to a phenomenon nwn as convection current. this is the reason of presence of moderate climate in coastal areas.
What direction does air above a heated surface move?
in a upward motion
How does air above a cold surface?
how does air above cold surface move
How does air above a cooled surface move?
Air above a cold or cooled surface contracts and falls.
How does sunlght affect the desert?
Sunlight is absorbed by the surface of the desert and the surface is heated. The surface, in turn, heats the air above the desert.
How does heat move between the earth's surface and the air above it?
POOOOOOP
What happens to air pressure as you move higher above the earth surface?
The air is thinner the higher you go.
What happens to air pressure as you move higher above earths surface?
The air is thinner the higher you go.
How does the number of particles in the air change as you move higher above the earth's surface?
1000
What does sunlight do in the desert?
Sunlight is absorbed by the surface of the soil which is heated. The soil then radiates that heat to the air above it, raising the temperature of the desert.
How does air move above heated surface?
When air is warmed up, its molecules move faster and faster and as a result they move further from each other. They still have the same mass, but they now occupy a larger volume. This means that its density is smaller.The opposite when air is cooled off. The molecules slow down, get closer together, occupy a smaller volume and therefore its density is bigger.When air is warmed up, it goes up. Once it's up there, is cools off and goes back down. Near the heated surface the air gets warmed up again, goes up, cools down, goes back down, and again and again.That's called a convection cell.
How can the mass of a pile of snow decrease on a sunny day when the air temperature does not rise above zero degrees celsius?
When the sunlight strikes the snow, the surface of the snow is heated above the air temperature and some melting and evaporation occur.
How does air above a warm surface move?
It moves up because therefore hot air rises and cold air sinks... it would be like evaporation except not because its air.
