Yes air is denser near the earth's surface than high in the atmosphere. The farther up air rises, there are less molecules of air between the outer edges of the atmosphere. This means there is a lot less air weighing down. A general rule of thumb is the higher the altitude, the lower the pressure: the lower the altitude, the higher the pressure.
Yes, due to the mass of the atmosphere above the surface the air is denser at the surface than high in the atmosphere.
It seems that Saturn doesn't have a surface. It is one of the gas giants (which include Jupiter, Saturn, Uranus, Neptune, and many of the "extrasolar" planets found so far). Those gas giants have a dense atmosphere that just gets denser and denser as you go deeper into the planet.
the most abundant gas of the atmosphere is nitrogen with high percentage 78.09
Meteor
Solar wind
The jet stream
The ozone layer is 12 - 15 km above the earths surface
Cirrus clouds are very high in the atmosphere making then furthest from the Earth's surface. They are very thin and wispy in appearance.
What is your answer?1500
The Earth's atmosphere extends anywhere from 250-400 miles off the surface, depending on where you are standing. Near the equator, it is thicker due to the heat from the surface and cloud reflection, and the high moisture and humidity.
Can comets hit the Earth's surface? Yes but they would have to be above a certain size so as not to burn up high in our atmosphere. You shouldn't worry though ...
It has a high speed as it begins re-entry, but the earths atmosphere slows it down as it approches the surface. The heat comes about due to the friction of the atmosphere on the shuttle as it slows.
They burn high in the earths atmosphere.
auroras
auroras
auroras
auroras
230 miles out into space