Geosphere: any regions that make up earth and its atmosphere.

Earths systems: lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).

convection currents in the mantle: heated mantle material is shown rising from deep inside the mantle while cooler mantle material things creating a convection current

what do scientist use to understand earths interior?: seismic waves.

What is earths interior like?: thin, outer crust mantle liquid, outer core in a solid inner core.

What layer of earth is the most dense: the core

What is the difference between continental crust and oceanic crust?: Continental crust is four times thicker

What causes earths magnetic field?: The poles

What does earths magnetic field protect earth from :It protects earth from seismic waves