1. Cleavage
The physical property of some minerals that cause them to break along smooth, flat surfaces

2. Crystal
A solid in which the atoms are arranged in an orderly, repeating 3D pattern

3. Element
A substance that cannot be broken down into a simpler substance by ordinary chemical changes. An element consists of atoms of only one type

4. Fracture
The physical property of some minerals that causes them to break into irregular, uneven, rough, or jagged surfaces

5. Gem
A beautiful, rare, highly prized mineral usually found in jewelry

6. Hardness
The resistance of a mineral to being scratched; it is determined by the arrangement of the mineral’s atoms

7. lava
Molten rock that reaches a planet’s surface through a volcano

8. Luster
The property that describes the way a mineral reflects light from its surface; can be metallic or nonmetallic

9. Magma
Molten rock material beneath Earth’s surface

10. Mineral
A naturally occurring, inorganic solid, with a definite chemical makeup, and crystal structure

11. Ore
A rock that contains enough of a valuable mineral to be mined for profit

12. Silicate
A mineral that contains silicon and oxygen and usually one or more other elements

13. Streak
The color of a mineral in powdered form

14. Crystal Structure
A mineral’s _____________________ will be one of the following 6 shapes: cubic, tetragonal, hexagonal, orthorhombic, monoclinic, triclinic