Other Chapters' Lyrics:

Earth Science 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 -:- Life Science 1 - 2 - 3 - 3b - 4 - 4b - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -:- Physical Science 3

Other Chapters' Notes:

Earth Science 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 -:- Life Science 1 - 2 - 3 - 3b - 4 - 4b - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 -:- Physical Science 3

 

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Earth Science Chapter 3 - Summary Notes

 

á      A mineral is a naturally formed, inorganic solid with a crystalline structure.  That means it isnŐt person-made, it isnŐt from a living thing, it isnŐt a gas or liquid, and it has a repeating inner structure.

á      Minerals are made of one or more types of elements.  The earthŐs crust has about 92 elements.

á      Each element is made of only one kind of atom.  An atom is the smallest part of an element that has all the elementŐs properties.

á      Two or more elements can chemically join to make a compound.  Most minerals are compounds.

á      Minerals have two major classes.  Silicate minerals include silicon and oxygen.  They make up 90% of the minerals in the earthŐs crust.  Nonsilicate minerals donŐt have silicon and oxygen.

á      The way a surface reflects light is called luster.  The shiniest minerals have metallic luster.

á      The hardness scale for minerals ranges from 1 to 10, with 10 being the hardest.  Talc is 1 and diamond is 10.  Minerals can only scratch other minerals lower on the hardness scale.

á      Some minerals have important uses, such as Chalcopyrite for coins and Galena for batteries.

á      Other minerals are valued because they are attractive.  Rare and attractive minerals are called gemstones.

á      Minerals are nonrenewable resources.  The more we recycle them, the more we will have in the future.