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Chemistry, 12.04.2021 22:20 JojoSiwa901

1. Minerals are substances with a fixed crystal structure and a unique chemical composition.
2. Processing ore sometimes involves
or grinding minerals.
3. Prehistoric people used for knives and arrowheads.
4. The average American house contains about pounds of minerals.
5. Early
used rocks as 2.6 million years ago

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