2007-10-04 05:14:28 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Gravity. In order to escape from Earth, any object, including a single molecule or atom, has to travel at over 7 miles per second. At the temperatures experienced in our atmosphere, molecules in the atmosphere do not have sufficient speed to escape, so remain bound to the planet as an envelope of gas. Lucky for us, really....
2007-10-04 05:22:29 · answer #1 · answered by Jason T 7 · 2⤊ 0⤋
The Earth's atmosphere is kept in place because of the gravitational pull the Earth exerts on particles in the atmosphere. But part of the Earth's atmosphere does not evaporate into space. The part that is lost out into space is the extremely light part icles like Hydrogen which can escape the Earth's gravity. But the Earth's atmosphere is also replenished by releases from planetary volcanism
2007-10-04 05:24:46 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Gravity
2007-10-04 06:37:56 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Only liquids and solids evaporate. Gases don't. Gravity keeps our atmosphere from leaving the earth.
2007-10-04 05:35:06 · answer #4 · answered by Renaissance Man 5 · 1⤊ 0⤋
Gravity. But if you want to know about evaporation, water droplets form clouds at a certain height because the pressure is low enough for it to condense. Thats one balancing force that acts to stop things from flying out in wild abandon.
2007-10-04 05:22:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Gravity.
2007-10-04 05:18:00 · answer #6 · answered by stork5100 4 · 2⤊ 0⤋
It's gravity that keeps our atmoshere here.
2007-10-04 05:20:36 · answer #7 · answered by Bobby 6 · 2⤊ 0⤋
gravity.
2007-10-04 05:49:09 · answer #8 · answered by moonlight 3 · 0⤊ 0⤋