Question

why does meteor burn on entering the earth surface

Answer 1

When a small ­meteor enters the Earth's atmosphere, it goes from traveling through a vacuum to traveling through air. Traveling through a vacuum is effortless -- it takes no energy. Traveling through air is another story.

A meteor moving through the vacuum of space typically travels at speeds reaching tens of thousands of miles per hour. When the meteor hits the atmosphere, the air in front of it compresses incredibly quickly. When a gas is compressed, its temperature rises. This causes the meteor to heat up so much that it glows. The air burns the meteor until there is nothing left. Re-entry temperatures can reach as high as 3,000 degrees F (1,650 degrees C)!

Answer 2

Because it travels very fast through vacuum and re-entry temperatures can reach as high as 3,000 degrees F (1,650 degrees C)!.
That is why meteors burn till entering earth surface