The thin blanket of atmosphere that envelops Earth extends several hundred miles into space. From sea level—the very bottom of the ocean of air—to a height of about 60 mi, the air in the atmosphere is made up of the same gases in the same ratio: about 78% nitrogen, 21% oxygen, and the remaining 1% a mixture of argon, carbon dioxide, and tiny amounts of neon, helium, krypton, xenon, and other gases. The atmosphere becomes less dense with increasing altitude: more than three-fourths of Earth's huge envelope is concentrated in the first 5 to 10 mi above the surface. At sea level, a cubic foot of atmosphere weighs about an ounce and a quarter. The entire atmosphere weighs 5,700 trillion tons, and the force with which gravity holds it in place causes it to exert a pressure of nearly 15 psi. Going out from Earth's surface, the atmosphere is divided into five regions. The regions, and the heights to which they extend, are: troposphere, 0 to 7 mi (at middle latitudes); stratosphere, 7 to 30 mi; mesosphere, 30 to 50 mi; thermosphere, 50 to 400 mi; and exosphere, above 400 mi. The boundaries between each of the regions are known respectively as the tropopause, stratopause, mesopause, and thermopause. Alternative terms often used for the layers above the troposphere are ozonosphere (for stratosphere) and ionosphere for the remaining upper layers.
2007-08-10 01:07:49
·
answer #1
·
answered by Anonymous
·
1⤊
3⤋
The sky is a direction to look and not a thing and not really a place. Asking what the sky is made of is like asking what south is made of.
2007-08-10 01:41:38
·
answer #2
·
answered by campbelp2002 7
·
0⤊
0⤋
Nobody made it. It formed.
The sky nearest to us is the atmosphere. It is composed out of several gasses. Mainly nitrogen and oxygen with lesser amounts of watervapour, CO2 and helium.
Beyond the atmosphere is space which contains the entire universe... But space itself is emptiness. Mostly vacuum where the main components are electromagnetic radiation, forcefields such as gravity and some ions, atoms and molecules.
2007-08-10 01:45:57
·
answer #3
·
answered by DrAnders_pHd 6
·
0⤊
0⤋
we could all cut and paste answers. But some of us like using our own words. the sky was made when the earth was formed. a thin layer of gaseous material was attracted by the gravity of the earth. the Atmosphere is mainly nitrogen and oxygen(80/20) but there are minute traces of other compounds(carbon dioxide, etc) the atmosphere used to be higher in carbon dioxide but when plants starting producing oxygen the carbon dioxide came in short supply. the sky is coloured due to oxygen,ozone and water vapour producing rayleigh scattering. hope this is a bit of insight for you.
2007-08-10 01:16:13
·
answer #4
·
answered by Booboo64 3
·
1⤊
0⤋
The 'sky' is actually space. There are still stars in the sky during the day but the reason you can't see them is that our local star (the sun) is so much closer that it outshines the dim stars, you need to wait until after our sun dips beneath the horizon to see the sky in all its glory.
2007-08-13 21:30:12
·
answer #5
·
answered by elflaeda 7
·
0⤊
0⤋
Sky tv is made up of a bunch of jerks that flash news events on the screen so fast you cant read them when trying to watch "Fox" News stories! [sry you had to ask]
2007-08-11 12:46:46
·
answer #6
·
answered by Satch 3
·
0⤊
0⤋
It is made of blue candy stuck in place by the fairies every morning before sunrise. Throughout the day, the sun melts it and it falls as blue rain to color the seas. The fairies collect it back up in their net bags made of spider's silk, and place it back into the air each morning.
2007-08-10 01:15:28
·
answer #7
·
answered by bottle babe 4
·
2⤊
0⤋
love.
2007-08-10 01:23:28
·
answer #8
·
answered by Anonymous
·
1⤊
0⤋