Rocks & Minerals

2. repeating pattern of a mineral having flat sides that meet in sharp edges and corners
8. naturally occurring, inorganic solid having a definite crystalline structure and unique chemical composition
9. the process of changing a rock into another as a result of heat, pressure or chemical reactions
12. rocks formed when seas or lakes dry up
14. the ability of a mineral to resist being scratched
15. rock formed from hot, fluid magma or lava, "born of fire"
16. minerals that are rare, hard, beautiful and durable that are often cut for jewelry
18. when a mineral breaks along rough or jagged surfaces
21. elements with dull surfaces, are poor conductors of heat and electricity, are not able to be stretched into wires or bent into different shapes
22. sedimentary rock formed from the fragments of preexisting rock
24. when a mineral splits into smooth, definite surfaces
25. the amount of matter in a given volume

1. rock containing rounded pebbles that is held together by clay or mud
3. small particles of rock
4. igneous rocks formed from magma within the Earth
5. elements that are shiny, conduct heat and electricity, can be stretched into wires and bent into different shapes
6. rocks formed when particles of rocks (sediments) are carried and deposited by wind and water
7. hard substances composed of two or more minerals
10. igneous rocks formed from lava on the outside of the Earth
11. rocked formed when chemical changes, heat or pressure, change a rock, "changed rocks"
13. the way a mineral reflects light from its surface
17. rock formed from once living organisms
19. the continuous changing of rocks from one form to another over long periods of time
20. the color of the powder scraped off of a mineral when rubbed against a rough, hard surface.
23. minerals or combinations of minerals from which metals and nonmetals are extracted