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Quiz on minerals. Get out you ESRT and a piece of paper The following questions are from your ESRT. You’ll have a minute per question…. Question 1. What is a minerals? Name three things mineral must have to be a mineral. Question 2.
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Quiz on minerals • Get out you ESRT and a piece of paper • The following questions are from your ESRT. • You’ll have a minute per question…
Question 1 • What is a minerals? • Name three things mineral must have to be a mineral.
Question 2 • What is a mineral that is nonmetallic, flexible in thin sheets, is black and has cleavage?
Question 3 • What is the chemical composition of olivine?
Question 4 • What controls a minerals property?
Answers • What is a minerals? • Solid, inorganic, naturally occurring • Nonmetallic, flexible in thin sheets • Biotite • What is the chemical composition of olivine • (Fe,Mg)2 SiO4 • What controls a minerals property? • IAOA
Rocks & Minerals The Building Blocks of society
Igneous Rocks Made from Magma and Lava
Igneous rocks • How are igneous rocks formed? • What do igneous rocks look like? • What do the characteristics tell us about the rock? • What are igneous rocks used for? • How do you use page 6 of the ESRT for Igneous rocks?
How are igneous rocksformed? • Extrusive or volcanic - lava on the earth’s surface • Intrusive or plutonic - inside the earth’s crust, magma chambers
What do igneous rocks look like? • Vesicular = gas bubbles (extrusive) Or • Nonvesicular = no gas bubbles
What do igneous rocks look like? • Felsic light in color and density, rich in aluminum (continental crust) or • Mafic dark in color and high in density, rich in iron and magnesium (ocean crust)
What do igneous rocks look like? • Texture can be glassy, fine grained, coarse grained, or very coarse grained
What do the characteristics tell us about the rock? • Cooled slowly in the crust = large minerals • Cooled rapidly on the surface = no or very small minerals • Vesicular = very gaseous lava flow