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Rocks and Minerals
Question | Answer |
---|---|
How are metamorphic rocks formed | heat and pressure |
What are the 3 types of rocks | sedimentary, igneous, metamorphic |
how are igneous rocks formed | cooling and solidification of lava or magma |
how are sedimentary rocks formed | weathering, erosion, deposition, compaction and cementing of sediments |
What is the rock cycle | a cycle that shows the process or processes of how 1 type of rock can be changed into any other type of rock |
what is a rock | a solid that is composed of 2 or more minerals |
what is a mineral | a naturally occurring, inorganic, solid with definite chemical composition and crystalline structure. |
What test do we use to identify minerals? | color, luster, streak, hardness, specific gravity, cleavage or fracture |
what are the specialty tests used to identify minerals? | magnetic, florescence, radioactive, reacts with HCL |
why is color not the best test to identify a mineral? | some minerals depending on where they are formed will have different elements in that particular mineral causing the same mineral to have different colors. Quartz is an example |
what is streak | the color of the power of the inside of the mineral |
how is hardness tested | using tools or minerals with known hardness |
what is the difference between cleavage and fracture? | Cleavage break along clean fat surfaces, Fracture does not |