In geographic terms a push factors is something that

In geographic terminology, when discussing migration you will often hear “push and pull factors.” A “push-factor” is something that encourages an individual to leave, or emigrate from, a certain place. A “pull-factor” is something that attracts individuals to migrate to a certain place.

Explanation:

explanation:

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 limited opportunities samples. so scientists also rely on analyses of seismic waves and gravity and as well as magnetic studies.