It's impossible to give a single pressure value for the entire crust, mantle, and core. Pressure increases significantly with depth, so each layer has a vast range of pressures within it. Here's a general breakdown:

Crust:

* Average pressure: Around 300 megapascals (MPa) at the base of the crust, equivalent to about 3,000 times atmospheric pressure.

* Range: Pressure varies greatly depending on crustal thickness, with thicker continental crust experiencing higher pressures.

Mantle:

* Average pressure: Ranges from around 300 MPa at the crust-mantle boundary to about 1.3 million MPa at the core-mantle boundary.

* Range: The mantle is much thicker than the crust, so pressure increases significantly with depth.

Core:

* Average pressure: Around 3.3 million MPa at the outer core and up to 3.6 million MPa at the center of the inner core.

* Range: The core experiences the highest pressures due to the immense weight of the overlying layers. This pressure is equivalent to about 3.3 million times atmospheric pressure!

Important notes:

* These are just estimations, as the exact pressure varies depending on location and geological factors.

* Pressure also affects other properties like density and temperature.

* The pressure at the Earth's core is so immense that it's difficult to measure directly. Scientists use models and indirect methods to estimate these pressures.

To visualize the pressure increase: imagine standing at the bottom of the deepest ocean trench, the Mariana Trench. The pressure there is around 1,000 times atmospheric pressure. The pressure at the Earth's core is roughly 3,300 times *that*!