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earth science - properties that we will exploit to try to...

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Earth Science lesson plan Rocks and Minerals Grade level : 5 th Type of lesson : Lecture, then lab to follow Background : Minerals are solid, inorganic, naturally occurring substances that have a definite chemical compositions and structure. These will form the basic building blocks of rocks and subsequently, of soils. They can be formed by freezing from a molten state (such as olivine, pyroxene, etc.), from precipitation from a solution such as calcite, gypsum, etc. or by solid state diffusion usually in a high temperature and pressure environment such as garnet, diamond, etc., although this can also occur at low temperatures and pressures such as hematite, clays, etc. As these minerals have a definite structure to them and a definite chemical composition, they exhibit certain physical
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Unformatted text preview: properties that we will exploit to try to identify a few of the thousands of different combinations that exist naturally. Some properties such as hardness and cleavage are related mostly to the mineral structure, others such as color or streak are mainly due to the mineral composition. Materials : Corundum, quartz, fluorite, calcite, gypsum rock. Streak plate, glass, iron nail, copper penny. Procedure: With each rock, try and scratch it with the streak plate, glass, nail and penny, and see if student can figure out with rock is which considering the hardness of the rock. (Rocks won’t be named in the lab, only on a paper with a number.)...
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  • Spring '07
  • Shoberg
  • definite chemical composition, streak plate, definite chemical compositions, lesson plan Rocks, Minerals Grade level

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