Why are earths rocks generally younger than earth itself.

The reason why the rocks are more younger than Eart itself is because they come from processes like plate tectonics, volcanoes, and erosions that made up Earth's surface.

The lack of impact craters and the age of most rocks on Earth in comparison to other bodies in the solar system can be attributed to processes such as volcanism, plate tectonics, and erosion that have reshaped Earth's surface, and this is why most of Earth's rocks are much younger than the Earth itself.