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Meteor is a rock that crashes into our atmosphere. An asteroid would be the last rock object that crashed into our atmosphere, since it would wipe out life on the planet.
Studying earth's layer's is important. It gives us an insight about how the atmosphere works.
Sorry, but I do not understand "eaths". You should have spell-checked the question before posting it.
The Moon
This phenomenon is called an aurora, where charged particles from the sun collide with Earth's atmosphere. The collisions excite atoms in the atmosphere, causing them to emit light and create colorful displays in the sky near the poles.
It's what we live on.
the inner core
yes... it is the closest layer to the eaths surface
The mantle is the softest layer of the Earth.
about 0.3 percent
Condensation transform vapors in liquid water.
Melted rock below the eaths suface is magma