Sept 8 Minerals.docx - Introduction to Earth Science -...

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Introduction to Earth Science - MineralsStudy Guide Questions1.What do diamonds and graphite (pencil lead) have in common? Why are they so different?2.What are the five requirements materials have to meet to be classified as a mineral?3.How and why do atoms form bonds?4.What different kinds of bonds can atoms form? This would make a nice matching question.5.Know the different mineral properties used for mineral identification.6.Why isn’t color a useful property for identifying minerals? What is streak, and does it alwaysmatch mineral color?7.What is mineral cleavage? How do cleavage and fracture relate to mineral structure?8.Why might one element or combination of elements form different minerals? How does thisrelate to the geotherm and changing pressure and temperature conditions within the Earth?9.What is a polymorph?10. Know the different environments that minerals form in. Why do I say that minerals areenvironmental fingerprints?Lecture DetailsOn to minerals!Major takeaways:1.To be a mineral, you need to meet five specific requirements.2.Minerals are environmental fingerprints: they reflect the specific conditions under which theyformed.3.Mineral properties are determined by their structure: how they behave is a reflection of how theyare put together.MINERALS! What do diamonds and pencil lead (graphite) have in common?:they are both madeentirely and only of carbonMinerals are:inorganicnaturally occurring solids with a crystalline structure and characteristicchemical composition.Let’s talk about salt. In 2016, the U.S. sold or used $2 billion in salt, and combined with China weproduce 40% of the world’s salt. The Iowa DOT uses 200,000 tons of salt annually to keep roads clear,and 90% of people in the U.S. eat more than the RDA of salt (~2,300 mg). We eat ~2.75 lbs. of salt ayear!ANDsalt is a mineral. Why is salt a mineral?

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Term
Fall
Professor
BradleyCramer
Tags
Mineralogy, Crystal

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