Science

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Across
  1. 2. time it take to make an isotope into an daughter's isotope
  2. 5. unstable isotopes process
  3. 7. leaves a gap in the the geologic record
  4. 9. same element different amount of neutrons
  5. 12. the age of an object since it was made
  6. 13. burrowing underground
Down
  1. 1. slabs that rest on plastic molded stuff
  2. 3. boundaries that dont blend well
  3. 4. based on radio metric dating
  4. 6. magma turns to rock
  5. 8. land slide,rockslides,and rockfall caused by gravity
  6. 10. bits of sediment strike other rocks.
  7. 11. thin layers of rock sedimentary