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A rock can be broken down into different kinds of substances by physical processes no chemical reactions are needed to separate different parts of a rock into pure substances this is because a rock is
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A rock can be broken down into different kinds of substances by physical processes no chemical reactions are needed to separate different parts of a rock into pure substances this is because a rock is a

User Vishal Yadav
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4 votes

Answer: option D

Step-by-step explanation:

User Evadeflow
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The answer is mixture. 
User Graphics Noob
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