Question

How have scientists been able to determine the compostion of earths layers

Answer 1

It is widely accepted that the Earth’s interior is composed of several layers: the crust, the mantle and the core. Since the crust is readily accessible, scientists have been able to perform hands-on experiments to determine its composition; studies on the more distant mantle and core have more limited opportunities samples, so scientists also rely on analyses of seismic waves and gravity, as well as magnetic studies.

Answer 2

The Earth is made up of the crust, the mantle and the core. Scientists have been able to perform experiments to determine the crusts composition.