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Unformatted text preview: Metallic Core Hot Plastic Mantle Crust BUT there are some major differences Closer to the Sun No water Very dense atmosphere made mostly of CO2 Much hotter Weak Magnetic field Venus resurfaced itself COMPLETELY about 500-800 million years ago. On Earth ocean floors are only about 200 million years old but the continents are almost 4 billion years old On Venus crust is very thick and heat builds up. Instead of plate tectonics (motion of the plates on crust) there are very large volcanic eruptions every 500-800 million years that cover the whole planet! Why? Probably due to lack of water...
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- Spring '08