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8 terms

Science Lesson 1 Minerals Vocab

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Mineral
A naturally-occurring, inorganic solid that has a crystal structure and a definite chemical composition.
Inorganic
Not formed from living things or the remains of living things.
Crystal
A solid in which the atoms are arranged in a pattern that repeats again and again.
Streak
The color of a mineral's powder.
Luster
The way a mineral reflects light from its surface.
Mohs hardness scale
A scale ranking ten minerals from softest to hardest; used in testing the hardness of minerals.
cleavage
A mineral's ability to split easily along flat surfaces.
fracture
The way a mineral looks when it breaks apart in an irregular way.