EARTH SCIENCE
MINERAL PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A type of mineral with a hardness of 2, it can be scratched with a fingernail. What type of mineral is this?
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talc
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calcite
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gypsum
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fluorite
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Explanation:
Detailed explanation-1: -The Mohs Hardness Scale ranks the order of hardness of minerals and some common objects. For example, your fingernail can scratch the minerals talc and gypsum, with a hardness of 2 or lower. A copper penny can scratch calcite, gypsum, and talc.
Detailed explanation-2: -The Mohs scale is shown below, along with what can scratch each mineral: Talc: easily scratched by a fingernail.
Detailed explanation-3: -Rocks are made up of one or more minerals. Talc is the softest: it can be scratched by all other materials. Gypsum is harder: it can scratch talc but not calcite, which is even harder.
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