Final answer:
Few impact craters are found on Earth because erosion, plate tectonics, and volcanism have erased them over time, unlike on the Moon where craters persist due to lack of such active geological processes and atmosphere.
Step-by-step explanation:
The reason why few impact craters are found on Earth is because erosion has erased most of them. Earth has indeed been subjected to impacts just as heavily as the Moon, but active geological processes such as plate tectonics and volcanism, combined with atmospheric effects, have altered the Earth's surface so much that evidence of these impacts has been largely destroyed. While our planet's active geology continuously renews the crust, erasing old impact craters, this does not happen on airless worlds like the Moon, where impact craters remain mostly intact over long periods.
Impact craters are extremely rare on Earth because these natural geological and atmospheric forces work to obliterate them. This is a stark contrast to the Moon and other solid worlds in our solar system, which lack such active geology and atmosphere, thereby preserving their impact histories.