geo unit 1 revision (crossword)

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Across
  1. 4. rock which has been changed underground, without melting
  2. 6. this rock forms when rock melts, then cools and hardens again
  3. 9. a mixture of minerals
  4. 10. hot, liquid rock
  5. 11. often mixed with quartz and other minerals
Down
  1. 1. (its two words) the cycle of rock changing from one type to another
  2. 2. the breaking off of layers
  3. 3. a mixture of clay and sand and rotting vegetation
  4. 5. solid rock, not yet weathered
  5. 7. the period of which the first animals were on land
  6. 8. the period of which dinosaurs were first around
  7. 9. something slightly acidic and falls from the sky