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Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Friedrich Mohs in 1822 is used to determine mineral hardness.
My friend flunked 8th grade but yet continued onto high school. But note, your parents can say yes to holding you back if a teacher recommends so. But other than that, you probably won’t get held back. But you will get held back in high school if you don’t pass.
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