How does the density and temperature of the crust relate to other parts of the earth?

The density and temperature of the Earth's crust are generally lower than those of the underlying mantle and core. As you move deeper into the Earth, both temperature and density increase due to the pressure and geothermal gradient. The crust, being the outermost layer, is less dense and cooler compared to the more molten and denser mantle beneath it, which influences tectonic activity and geological processes. This gradient plays a crucial role in driving convection currents in the mantle, affecting plate tectonics and the overall dynamics of the Earth.