Rocks, Gems, Minerals

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Across
  1. 3. a colored mark left when a mineral is rubbed across a piece of unglazed porcelain
  2. 4. Hot melted rock that has reached the surface of Earth
  3. 8. A tool used to detect and measure radioactivity
  4. 10. Formed from any of the three types of rock when they are subjected to heat, preassure, or chemical changes
  5. 11. A substance that cannot be broken into simpler substances by chemical means
  6. 12. The mass of rock in which crystals are set
  7. 13. It is formed as magma cools and hardens on or below the surface of Earth
Down
  1. 1. The most common volcanic igneous rock
  2. 2. A mixture of two types of metals or a mixture of a metal and a nonmetal
  3. 5. Formed through the erosion, transportation, deposistion, and cemetation of pre-existing rocks
  4. 6. Form the geometric shape formed by a mineral that is determined by its atomic structure
  5. 7. the remains of any organism that once lived that ar usually chemically altered and preserved in some way
  6. 9. A tool that measures slight variations in Earth's gravitational field that may be used to locate metal ores