What makes mountain peaks so cold?
u c,when the sun’s radiation hits the earth,the earth surface absorbs the heat and radiates it back into the atmosphere.so the closer u r to the surfacethe more heat u receive.thats y mountain tops r colder.aslo,the temperature drops by 6degrees celsius fr every 110m of ascent frm the earth’s surface.
The air at the ground is at a higher pressure than air higher up; this is because the air at the ground is compressed by the weight of all the air above it. Air weighs quite a lot: A square column of air one meter across weighs ten tonnes! The air pressure decreases steadily as you go up, since there’s less air pressing down from above, until you reach zero pressure, which is outer space. In what follows, I’ll talk a lot about “air parcels”. You should imagine a “chunk” of air, identical to the air around it, but identified by drawing an imaginary boundary around it, or by marking each of the molecules in it with a little tattoo. Now, the air in the lower atmosphere (the “troposphere”) is constantly mixed by convection, which results from sunlight heating the ground. So air parcels are being constantly lifted from the ground to high altitude and back again. As a chunk of air rises, its pressure decreases, and so its temperature drops. Descending parcels are warmed as they’re compressed
