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Across
  1. 1. Force that is pushed toward the center of an object.
  2. 4. The line between younger and older rock that is marked by erosion.
  3. 6. What turns into sedimentary rocks.
  4. 8. Separates an irregular older rock unit from younger sedimentary layers.
  5. 9. Forces that slide past each other.
  6. 12. Has some but not all properties of a mineral.
  7. 15. Age compared to other rocks.
  8. 16. The study of position and relation to strata (layers).
  9. 17. Planets with gassy surfaces.
  10. 19. Rocks formed when magma cools and hardens.
Down
  1. 2. rocks formed from sediment.
  2. 3. A part of strata that eroded away.
  3. 5. Processes were the same billions of years ago.
  4. 7. Planets with rocky surfaces.
  5. 10. Age of a rock in years.
  6. 11. The force by which a planet or other body draws objects toward it's center.
  7. 13. Force that pulls away from the center of an object.
  8. 14. rocks formed when other rocks are altered by heat/pressure.
  9. 18. naturally occurring solid mass.
  10. 20. A giant cloud in space.