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The Earth Earth's layers Crust Mantle Inner Core Outer Core Compare these layers to the parts of an apple. Parts of an apple Peel = crust Fruit = mantle Outer core = core Inner core = seed What are the 3 types of rocks? 3 types of rocks Igneous rocks Sedimentary rocks Metamorphic rocks How are each of these rocks formed? Melted rock cools and becomes hard Layers of mud and sand slowly turn into rock Rock is changed by pressure and heat
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