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7 MINERALS


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IN THIS LESSON WE ARE GOING TO:
•revise some vocabulary and grammar from the previous lessons
•learn how to give a feedback and how to learn from the feedback (poster presentation)
•learn how to describe minerals and distinguish between them
•learn new vocabulary
•revise classifying
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DISCUSS
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•Which conditions must be satisfied for a substance to be a mineral?
•Which physical properties do we distinguish when we want to identify the mineral?
•What is Mohs‘ hardness scale?
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CLASSIFYING
•Use the Internet where necessary to finish the following sentences:
•We classify minerals according to …
•We divide minerals into …
•Calcite belongs to …
•Minerals consist of …
•Gypsum is significantly different from…
•Diamond is much … than …
•Quartz contains …
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DISCUSS
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•What is cleavage? How is it different from fracture?
•How do smooth crystal faces differ from cleavage surfaces?
•What is harder? Calcite or topaz?
•Could a fingernail leave marks on gypsum?
•Which minerals have metallic luster?
•What would happen if you rubbed a diamond against porcelain?
•Is color important in the process of mineral identification? Why/not?
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TASK
•Describe physical properties of some sample minerals
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•This mineral breaks along one cleavage direction, it is quite a soft mineral, it can be dark brown
to dark black, it has a light tan streak and glassy luster. It forms flakes and sheets.
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•Biotite mica

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SOURCES
•https://www.tes.com/lessons/CYvuVc7DjOo-3Q/earth-s-minerals (picture)
•https://www.youtube.com/watch?v=7MvXv66b5h4 (video)
•McGeary, David. Physical Geology. 4th Edition. McGraw-Hill. New York 2001
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