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

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

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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

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

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

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What layer of earth is the most dense: the core

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

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What causes earths magnetic field?: The poles

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

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