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What type of breakage is displayed here?
Cleavage, minerals breaking along planes or even surfaces, is shown here.
What type of breakage is displayed here?
Fracture is shown; breakage along irregular surfaces.
How many elements primarily make up the Earth's crust?
The Earth's crust is mainly made of eight elements.
What are minerals called that are made of one single element?
Native elements are minerals that are comprised of only one element.
What causes crystals to have a particular shape?
The structure of the atoms/molecules that make up crystals will give them their shapes.
What is a substance that cannot be broken down into simpler substances by chemical means?
An element is a substance that cannot be broken down into simpler substances by chemical means.
List five uses for minerals.
Minerals are used for medicines, fertilizers, jewelry, building materials, cosmetics, cooking materials (pots/pans/glassware), salt.
Name two unusual ways to identify minerals.
Unusual ways to identify minerals are to apply acid to it, look through it (double refraction) and another is whether or not the mineral is fluorescent (glows).
Why is color not the best indicator of a mineral's identity?
Some minerals occur in multiple colors, and some minerals appear naturally in the same color.
What is the hardest mineral on Moh's Scale?
The diamond (10) is the hardest mineral on Moh's Scale.
What is the softest mineral on Moh's Scale (1)?
Talc is the softest mineral on Moh's Scale.
What measuring tool is used to determine a mineral's hardness? What type of device is used to help with this determination?
Moh's Scale is used to determine a mineral's hardness.
What property describes a mineral's ability to scratch another?
Hardness describes a mineral's ability to scratch another.
What color(s) are streak tiles? Why?
Streak tiles can be white or black. If the mineral is light, use a dark streak plate. If the mineral is dark, use a white streak plate.
What does one do to perform a streak test?
To perform a streak test, scratch the mineral on a piece of unglazed ceramic tile.
What describes the color of a mineral in powdered form?
Streak describes a mineral's color in powdered form.
What property describes how light can travel through a mineral?
Transparency describes how light can travel through the mineral.
Name five types of luster.
Waxy, pearly, glassy, dull, metallic, nonmetallic all describe types of luster.
What term describes the way light reflects off of a mineral?
Luster
Name at least four criteria to describe a mineral.
A mineral is an naturally occurring, inorganic solid with a consistent chemical composition.