weathering and erosion
Weathering is the breaking down of rocks and erosion is the moving of rocks the agents of weathering are water, wind, salt, acid rain,ice,animals and plants.
The agents of erosion is wind, water, ice and gravity.
They Chang the earths surface because weathering is breaking and it makes all kinds of little pebbles all over the planet. erosion is moving rocks so it makes rocks go down stream and make it so people can get arrow heads.