Geologic Time Scale Crossword

1234567891011121314
Across
  1. 2. to break down
  2. 6. process of storing carbon dioxide (CO2) in underground geologic formations
  3. 9. radioactivity
  4. 10. a hollow container
  5. 13. finding ages using comparisons
  6. 14. atom before it undergoes any chemical change
Down
  1. 1. is the rate of decay, and means the amount of time it takes for half of a remaining isotope to decay to a daughter prototype
  2. 3. the study of past events
  3. 4. a material covering a surface of a body
  4. 5. remains of organisms that has been preserved over time
  5. 7. a person who studies rocks, geology
  6. 8. numeric age of a layer of rocks
  7. 11. the placement of one thing above or on top of another
  8. 12. emission of ionizing radiation or particles