F. A mineral can scratch calcite, and it can be scratched by a wire nail. 1. Wha

Question

F. A mineral can scratch calcite, and it can be scratched by a wire nail. 1. What is the hardness number of this mineral on Mohs Scale? 2. Which mineral on Mohs Scale has this hardness? G. The brassy, opaque, metallic mineral in Fig. 3.3AD is the same as the mineral in Fig. 3.130, What is this mineral's hardness, and how can you tell? H. A mineral sample has a mass of 27 grams and takes up 10.4 cubic centimeters of space. What is the specific gravity of this mineral? Show your work. I. Analyze these two photomicrographs of ice crystals (snowflakes) by William Bentley (Fig. A3.2.50). 1. Both ice crystals have the same number of arms that radiate out from the center. How many arms do ice crystals have? 2. There are seven different crystal systems: triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal and cuhic IIsing the numher of arms.on Activity 3.3: Determining Specific Gr /page/ac375a345ad299dcc39ced1219487046612441241?platforms idemast rson.com/eplayer/book/FVMVIGJXOP4

Explanation / Answer

F. 1. Hardness number of this mineral on Mohs scale is 4.

2. Fluorite

H. Specific gravity of a substance is same as its density in grams per cc. So density = 27/10.4 = 2.596 gram per cc.

Note: since figures for other questions are not available so unable to answer them.

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