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Across 5. A state of matter that has a definite shape and size 7. The points of a solid. 9. A type of solid that lacks a ordered internal structure. 10. Transparent solids that are often worn on human faces. 11. The smallest group of particles within a crystal 12. The temperature at which a solid turns into a liquid

Down 1. A type of crystal structure where the atoms are located at the center and the corners. 2. The temperature at which a liquid turns into a solid 3. A crystal structure at which atoms or ions are arranged at the corners of the solid. 4. Two or more different molecular forms of the same element 6. The sides of a crystal 8. A type of solid that has many structures and faces