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2006-10-18 12:41:33 · 7 answers · asked by Baby Girl 2 in Science & Mathematics Other - Science

7 answers

Severe acne in adolescence.

2006-10-18 12:43:38 · answer #1 · answered by Anonymous · 0 0

All the craters are from impacts, and most were formed in the early part of the Solar System 4 billion years ago.

Scientists were divided on whether they were impact or volcanic in origin, but the Apollo missions proved conclusively that the craters are the result of impacts from space.

Note that the lack of craters on Earth is not due to Earth's protective atmosphere, like the previous person said. The atmosphere only protects us from small impactors.

There are two processes that wipe out the crater traces on Earth. In the shorter term (millions of years), erosion deforms them. In the longer term, (hundreds of millions of years), all crustal material is recycled in the process of subduction - that is where one tectonic plate buries itself under its neighbour.

Earth would have been equally bombarded as the moon in the Early history of the Solar System, but those craters have all been swallowed up by subduction and regurgitated many times as new crustal material.

2006-10-18 19:47:03 · answer #2 · answered by nick s 6 · 0 0

meteors and asteriods that smash on the surface. Why? because the moon has no atmosphere to burn them up like our Earth does.

2006-10-18 19:44:19 · answer #3 · answered by Chelly 3 · 0 0

Hi. Most are impacts sites and a few are volcanic.

2006-10-18 19:43:15 · answer #4 · answered by Cirric 7 · 1 0

other objects colliding with the moon.

2006-10-18 19:53:20 · answer #5 · answered by Krissi 4 · 0 0

that man who lives there.

2006-10-18 19:49:08 · answer #6 · answered by noitall 3 · 0 0

meteors and asteroids or whatever hitting it.

2006-10-18 19:43:04 · answer #7 · answered by Christine4tw 3 · 0 0

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