Week 6: We identified rocks.
Rocks are used to build roads, buildings, make glass, and carve. They are set into jewelry, used as game pieces, table tops, and in a variety of other ways. Within the three main categories of rock sedimentary, metamorphic and igneous, rocks can be further divided.
The book How the Earth Works (How It Works) has a nine step process for further identifying rocks. Many of the steps are similar to those used in Mineral Identification. Looking at the grains within a rock, determining if it fizzes with vinegar, testing its hardness, and calculating its density provide significant clues to identification.
The rock section of geology contains pictures and brief descriptions of different types of rocks which was helpful during the identification process.
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