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Layers of the earth - Coggle Diagram
Layers of the earth
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Mantle
Upper mantle
When volcanoes erupt ,rock sample from the mantle come to the surface.
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Rocks rise due to heat and then cool, they sink back to the core.this movement causes crust to break into plates.
Lower Mantle
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Lower mantle is rich in magnesium, white metallic element
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When plates move and crash, they cause earthquake and volcanic eruption and then mountains and new sea floors are formed.
made of thick solid rocky substance , iron and minerals
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