Biology, 22.08.2019 07:30 tiwaribianca475

How can you tell whether a unknown substance is a mineral

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A mineral is any chemical compound with a constant chemical composition, which of course is the definition of a "pure substance".

In earth science you might be distinguishing between "rock" and "mineral". A mineral is a pure substance. A rock is a mixture of two or more minerals in various proportions.

For instance, the rock granite is made up of three minerals: quartz, feldspar and biotite (mica).

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that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."

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