"where the oxygen level increases then combustion takes place"
MESOSPHERE
The Earth has an atmosphere around it.The Thermosphere is the top-most layer of the atmosphere.The troposphere is the lowest part of the atmosphere.Unlike Earth,the Moon has no atmosphere.That's why meteoroids don't burn up before they hit the surface.Even though the Earth's atmosphere is immense,sometimes meteoroids get through the atmosphere.
Meteors.
That depends. Meteoroids are pretty cold when they float around in space. When they enter our atmosphere, they get super hot and usually burn up in the thermospere.
Meteoroids
True. The vast majority of meteoroids burn up in the atmosphere, and reach the ground only as dust, after drifting around in the atmosphere for some time. (The stuff you wipe off the top of the TV set? Some of it is probably meteor dust.)
That's a description of meteoroids.
Because they are going at very high speeds. Things cannot burn in space, because there is no oxegen.
Both meteoroid's and comets are made out of rock and burn up when getting into earths atmosphere.
When objects enter an atmosphere, they get very hot and would burn up due to friction. Mercury, however, does not have a atmosphere that can block meteoroids, so it is continually battered by space rocks.
All planets, both with and without atmospheres, encounter meteoroids. If the planet has an atmosphere then those meteoroids will burn up long before reaching the surface. Those without atmospheres do not have such protection and so the meteoroids strike the surface directly.
Meteoroids burn up in the Mesosphere. Even though the Mesosphere is the coldest layer, the meteoroids burn up from getting too cold. Meteoroids are also more commonly known as "shooting stars".