Earth History

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Across
  1. 2. entrance of magma through rock formations
  2. 3. comparison of age based on what is older
  3. 4. timeline of Earth's history
  4. 6. finding the age of fossil based on decay
  5. 8. a scientist who studies fossils
  6. 10. a fossil- can be found in one time layer
  7. 11. movement of magma through Earth's crust
Down
  1. 1. law states-top layer is the youngest layer
  2. 5. cylinders of ice drilled from glaciers
  3. 7. the exact age of a rock/ rock layer
  4. 9. remains of a prehistoric creature
  5. 11. division of time marked by large events