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geology review

geology review - Earth 1 When was Big bang and when did our...

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Earth 1. When was Big bang and when did our Earth form? 0 13.5 billion years ago big bang. 4.53 billion years. 2. Know earth’s radius/diameter, thicknesses of crusts and lithosphere 0 6,370km radius, crust is 40 km, lithosphere is 100 km 3. Know the physical (solid/liquid/partially molten) and chemical (iron, silicon, oxygen, magnesium, etc) properties of different layers (e.g., of the two cores, different layers of mantle and that of crust) 0 Inner Core -Solid iron and nickel 1 Outer Core- Liquid iron and nickel 2 Lower Mantle- Iron Magnesium Silicon Oxygen 3 Asthenosphere- partial molten Iron Magnesium Silicon Oxygen 4 Upper Mantle- Iron Magnesium Silicon Oxygen 4. The two most abundant elements of the whole earth and of the crust 0 Iron 35% Oxygen 30%; Crust Oxygen 46% Silicon 28% 5. plate, different types of plate boundaries, examples of each Divergent boundaries (away from each other) Mid oceanic ridge, Convergent boundaries(towards each other) Mountain belts, Transform Boundaries (side by side) 6. Characteristic features of different types of plate boundaries: e.g., mid-oceanic ridge, subduction zone, trench, arc etc etc.
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