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mrs stagg

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nucles = protons (positive) + neutrons(neutel);atomic mass is the number of protons plus neutrons .
Electrons (negative) move around the nucleus.
Know the layers of the earth in order from thickest to thinnest and know order layers from outside to inside thick to thin: mantle, outer core, inner core, crust. outside to inside: crust mantle, outer core, inner core. the crust floats on the mantle because it is less dense.
know the compostive of each layer crust earths surface and continental/oceanic plates where we live
Created by: kuntry.lfe
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