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Rocks and Minerals

This is the vocabulary for the Rocks and Minerals unit in science.

Mineral A naturally occuring, inorganic solid that has a crystal structure and a definite chemical composition.
Density The mass per unit volume of an object (mass divided by volume).
Silicate A member of the mineral group that has silicon and oxygen in its crystal structure.
Crystallization The process by which atoms form a solid with an orderly repeating pattern.
Magma Molten rock stored beneath Earth's surface.
Lava Magma that erupts onto Earth's surface, usually through volcanoes.
Minerologist Scientist who studies the distribution of minerals, mineral properties, and their uses.
Luster A mineral's luster is the way a mineral reflects or absorbs light at its surface.
Streak The color of a mineral's powder
Hardness A mineral's resistance to being scratched.
Cleavage The breaking of a mineral along a smooth, flat surface.
Fracture The breaking of a mineral along an irregular or rough surface.
Ore A deposit of minerals that are large enough to be mined for a profit.
Gemstone A rare and attractive mineral that can be worn as jewelry.
Created by: SB20
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