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Why are the largest craters we find on the Moon and Mercury so much larger than the largest craters we find on the Earth?

Because the largest craters were made early in each world's history, and geologic activity has erased all traces of this early period on the Earth's surface.

Because the Moon and Mercury have larger gravity, which can attract larger pieces.

Because the Moon and Mercury do not have atmospheres to protect them from the largest pieces that can hit.

Because the Earth's magnetic field protects us from larger impacts.

Because the Moon and Mercury have much larger volcanic eruptions.

2007-02-18 16:59:31 · 9 answers · asked by ast10177 1 in Science & Mathematics Astronomy & Space

9 answers

Atmospheres are made up of atoms that cause friction and protect by burning up all or some of incoming objects.

2007-02-18 17:09:07 · answer #1 · answered by Anonymous · 0 0

All of those theorys are incorrect. The Moon has no atmosphere as compared to a planet like earth. Meteors and meteorites and other objects slam into the moon on a regular basis simply because it is in the way and has no atomsphere to protect it. Same with Mercury. The same number of objects would strike the planet Earth in a given day except for the fact that we have a thick and protective atmosphere that protects us from all but the largest of space debris. Most objects evaporate or burn in our atmosphere long before doing any damage. Good reason to help protect the atomsphere wouldn't you say?

2007-02-19 01:47:42 · answer #2 · answered by ToolManJobber 6 · 0 0

The craters on Mercurty and the moon were made due to meteor impacts, The craters cooled relatively quickly and since both bodes are seismically dead and airless, there was no activity to disturb the craters made. The worlds largest crater is actually off the coast of the Yucatan Peninsula in Mexico, and is believed to have led to the extinction of the dinosaurs. However since the Earth is seismically active, the crater was filled in with ocean water and sediment after the initial explosion, but geological clues remain.

2007-02-19 01:07:24 · answer #3 · answered by Kenneth H 3 · 0 0

I disagree. There are huge craters on the earth, they just aren't on the surface.

Early history could be it
gravity is wrong
atmospheres could be it
magnetic field is wrong
volcanoes is wrong.

2007-02-19 01:36:33 · answer #4 · answered by Anonymous · 0 0

This is strictly a guess, It is my understanding that the size of a crater is caused by the size of what hit that spot. Craters are caused by meteors hitting a surface.

2007-02-19 01:07:07 · answer #5 · answered by READER 1 5 · 0 0

also the earth is majority water ......and hides most big craters for example the dino killer hit off the south american coast and they just found that out last decade

2007-02-19 01:44:49 · answer #6 · answered by jdogg 1 · 0 0

One question was OK. Two of your homework questions is too much. Look up the answer in your notes or book. It will take less time than typing this.

2007-02-19 01:05:25 · answer #7 · answered by Gene 7 · 0 0

I opt for statement #1.

2007-02-19 01:04:18 · answer #8 · answered by CAROL P 4 · 0 0

im going all in on the atmosphere one

2007-02-19 01:45:54 · answer #9 · answered by 13Fox 2 · 0 0

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