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geo directory

Some of these questions must be answered by consulting your textbook which correlates with the video series.  Consult: "Physical Geology -Earth Revealed" by Carlson, Plummer and McGeary; published by McGraw Hill, New York City, NY


 Episode 12. Minerals: The Materials of Earth

Minerals have been indispensable to human civilization. This program looks at the variety of minerals, their atomic and crystalline structures, and their physical properties such as hardness and luster. Petrologists’ methods of sectioning rocks are shown, and gems, precious metals, ore excavation, and the value of silicates are discussed.

Episode 12: Minerals

What five characteristics are required for a substance to be considered a mineral?


What are rocks (why can't we call minerals "rocks")?


What are some of the common rock forming minerals?


How can the growth of a mineral be compared to the construction of a block wall?


Why is quartz harder than steel?


What is cleavage?


How does the cleavage of feldspar differ from the cleavage of mica?


What is one easy way to distinguish calcite from quartz?

What is the chemical formula of quartz and what is it's hardness on the Moh's scale?


What happens when you drop acid on a carbonate mineral (or rock)?

What is the chemical formula of calcite and what is it's hardness on the Moh's scale?

How deep in the crust were the granitic rocks of the Whipple Mountains formed?


Discuss diamonds and graphite. What makes them so different?


Discuss hydrothermal solutions and the precipitation of metallic minerals.


What is the origin on most hydrothermal solutions?


Discuss the formation of ore minerals.


Discuss the importance of the silicate minerals

link to answers  (this will not be an active link until after the assignment due date!)