1) Four main layers of Earth are a) crust, mantle, outer core, inner core b) mercury, venus, mars, jupiter 2) The outermost layer of the Earth that we live on is called a) mantle b) crust 3) The thickest layer of the Earth is called the a) mantle b) crust 4) The magnetic field of the Earth is created by the a) inner core b) outer core 5) This core is rich with nickel and iron and is solid  a) inner core b) outer core 6) The outer core is a) solid b) liquid 7) What brings mantle material to the surface? a) volcanoes b) earthquakes 8) What shows us how layers interact? a) volcanoes b) earthquakes 9) This is mostly solid rock a) mantle b) crust 10) The inner and outer core is the size of a) Saturn b) Mars

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