Decondly, the Earth is still geologically active, with continental plates floating on our planet's molten interior. Its surface is being continually renewed. The Moon has no atmosphere or weather, and is now believed to be completely solidified. An interesting project would be to search for craters on the Earth. All you need are some good maps, like those produced by the Canadian Department on Energy Mines and Resources.
Satellite pictures are now widely available.
These are really useful for any physical geography project. Check out your local science store. The best place to search is where the rocks are very old, and are likely to have been hit many times. These ancient rocks are exposed over huge areas of Northeastern Canada. The Shield is made up of granite and other igneous rocks, covered with forests, lakes and rivers.