Why does the Earth have fewer craters than the moon?

Earth is geologically active and has an atmosphere and water. The moon has none of these. The atmosphere protects Earth from smaller objects, but not from larger ones. When craters do form on Earth, wind water, and ice erode them away and often bury them in sediment. What is left of the craters may be destroyed by plate tectonics as rocks are folded, faulted, or sink into the mantle. Other than asteroids and comet impacts, the moon's surface has changed little since it first formed.