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

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