CK12 Earth Science
Color, Streak, and Luster Diamonds have many valuable properties, but one of the reasons they are used in jewelry is because the ...
the color of the larger mineral sample, asFigure3.14shows. If you did a streak test on the yellow-gold pyrite, you would see a b ...
(Source:http://en.wikipedia.org/wiki/Mineral,License:GNU-FDL) Can you match the minerals inFigure3.15with the correct luster fro ...
Hardness Hardness is a mineral’s ability to resist being scratched. Minerals that are not easily scratched are hard. You test th ...
Cleavageisthetendencyofamineraltobreakalongcertainplanestomakesmoothsurfaces. Minerals with different crystal structures will cl ...
Figure 3.17: Cubes have six sides that are all the same size square. All of the angles in a cube are equal to 90°. Rhombohedra a ...
of these properties are listed in theTable3.3. Although these properties are rare, several minerals have them. An example of a m ...
You have two mineral samples that are about the size of a golf ball. Mineral A has a density of 5 g/cm^3. Mineral B is twice as ...
3.3 Formation of Minerals Minerals are all around you. They are used to make your house, your computer, even the buttonsonyourje ...
Rocks from Magma Magma cools slowly as it rises towards Earth’s surface. It can take thousands to millions of years to become so ...
Minerals from Lava Lava is on the Earth’s surface so it cools quickly compared to magma in Earth. As a result, rocks form quickl ...
Minerals from Salt Water Tap water and bottled water contain small amounts of dissolved minerals. For minerals to crystallize, t ...
Figure 3.23: The limestone towers are made mostly of calcite deposited in the salty and alkaline water of Mono Lake, in Californ ...
fills cracks in rocks are calledveins. Figure 3.24shows white quartz veins. When the minerals are deposited in open spaces, larg ...
Review Questions How does magma differ from lava? What are two differences between granite and rhyolite? What happens to the mi ...
3.4 Mining and Using Minerals When you buy a roll of aluminum foil or some baby powder, do you think about how the products were ...
and rocks. For example, they might test rocks to see if the rocks are magnetic or contain certain chemical elements. Then, geolo ...
Placers are valuable minerals that have collected in stream gravels, either modern rivers or ancient riverbeds. California’s nic ...
Figure 3.28: Scientists test water that has been contaminated by a mine. ( 10 ) ...
Making Metals from Minerals We rely on metals, such as aluminum, copper, iron, and gold. Look around the room. How many objects ...
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