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GEO 101 CSUSB Castillo Exam 2

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GEO 101 CSUSB Castillo Exam 2 What is a mineral? - ✔✔ 1. naturally occurring 2. inorganic (no C-H bonds) 3. solid 4. with a definite chemical composition, and 5. an orderly internal atomic arrangement Which mineral(s) react with acid? - ✔✔calcite Which mineral(s) are magnetic - ✔✔magnetite Which mineral(s) have striations? - ✔✔pyrite, feldspar, & quartz Name a mineral that has a high density - ✔✔iridium, platinum, & lead What is the difference between cleavage and crystal form? - ✔✔Cleavage - the tendency of minerals to break along planes of weak bonds. Crystal form When there is enough space for crystals to grow freely, then the external form of the crystal reflects the internal orderly arrangement of atoms repeated throughout the solid What is the silica tetrahedron? - ✔✔Si and O pack efficiently to form a tetrahedron, with 1 Si in the middle and 4 O around it Which silicate minerals have a structure made of isolated silica tetrahedra? - ✔✔olivine Which silicate minerals have a structure made of single chains silica tetrahedra? - ✔✔pyroxene mineral group Ex. augite Which silicate minerals have a structure made of double chains of silica tetrahedra? - ✔✔amphibole group Ex. hornblende Which silicate minerals have a structure made of sheets of silica tetrahedra? - ✔✔biotite & muscotive Which silicate minerals have a structure made of a 3-dimensional framework of silica tetrahedra? - ✔✔orthoclase, plagioclase, & quartz Which silicate minerals are considered mafic? Which are felsic? - ✔✔olivine, amphibole, biotite Name the three different types of particles that make up atoms. - ✔✔Protons, neutrons, and electrons Which particles are found in the nucleus? - ✔✔protons and neutrons Which particles have a positive electric charge? Negative charge? Are electrically neutral? - ✔✔Protons: positive charge Neutrons: no charge (electrically neutral) Electrons: negative charge What is the difference between a rock and a min

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