Answer:
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.
1. Huwa fupi - hadithi fupi nyingi huhitaji kuunganishwa pamoja kuunda kitabu kimoja. 220
C. because if he only has $150 with him he can't spend more than $150 dollars.
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