2007-02-05 03:05:52 · 12 answers · asked by jc 2 in Science & Mathematics ➔ Earth Sciences & Geology
"air" is composed of many diff. elements. Nitrogen making up the majority of our "air" - the nitrogen weighs down on the other major elements like oxygen and hydrogen and keeps it close to the earth's surface for us to breathe.
2007-02-05 03:09:20 · answer #1 · answered by The Indigo Cobra 4 · 0⤊ 1⤋
All around the earth there is a thick blanket of air called the atmosphere. Air, like other gases, does not have a fixed shape. It spreads out to fill any available space so nothing is really empty. But air cannot escape from the atmosphere as the force of gravity keeps it from floating away from the earth.
2007-02-05 11:10:05 · answer #2 · answered by talkingformydog 4 · 0⤊ 0⤋
Since air exists in the Earth's atmosphere and all of the atmospheric layers of the Earth are under the influence of Earth's gravity, the air is bound to stay on Earth
2007-02-05 11:12:42 · answer #3 · answered by aaqib 1 · 0⤊ 0⤋
You can't just float off into space, gravity keeps you down. Even though you might not feel it, air has weight too. Gravity applies to it too. Gravity ensures that it is kept near the earth, just like anything with mass.
2007-02-05 12:17:39 · answer #4 · answered by Rudolph J 1 · 0⤊ 0⤋
The gasses that make up our atmosphere have mass, therefore the earths gravity prevents them from just drifting away from the planet
2007-02-05 11:09:29 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Gravity.
2007-02-05 11:08:07 · answer #6 · answered by saudipta c 5 · 0⤊ 0⤋
Gravity attracts air molecules too.
2007-02-05 11:08:46 · answer #7 · answered by Curious George 4 · 0⤊ 0⤋
it is to heavy to climb out to space and float away
2007-02-06 06:37:24 · answer #8 · answered by bev 5 · 0⤊ 0⤋
Our upper atmosphere.
2007-02-05 11:09:36 · answer #9 · answered by Anonymous · 0⤊ 0⤋
gravity
2007-02-05 11:07:48 · answer #10 · answered by links305 5 · 0⤊ 0⤋