Do the earths layers mix

Answer 1

The Earth's layers do not mix in the way that liquids or gases do. The Earth is composed of distinct layers: the crust, mantle, outer core, and inner core, each with different compositions and properties. While there can be some interaction, particularly between the crust and the upper mantle (as seen in tectonic activity), the layers remain largely separate due to differences in temperature, pressure, and physical state.