Question

Why does Earth have fewer impact craters than other planets?

at least four reasons

Answer 1

Primarily because earths' atmosphere disintegrates many meteorites before they reach the Earth. Secondarily because earth's more active tectonic motions delete them.

Explanation:

First, fewer small-to-medium sized meteorites arrive on the surface to create craters because the friction of the atmosphere on entry disintegrates them.

Second, in the early formative stages when possibly more large pieces were hurtling around, the earth was much more "active" in surface changes by tectonic movements and volcanoes. Thus, the evidence of meteorite impacts that are still visible on some other planets are no longer existent.