Geological Time Scale

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Across
  1. 2. EXACT AGE
  2. 4. A SAMPLE OF ROCK THAT SHOWS THE LAYERS AND FOSSILS
  3. 7. THE RULE/LAW OF _____ THAT SAYS THE ROCKS INSIDE OTHER ROCK IS OLDER THAN THE OTHER ROCK
  4. 8. THE ORDER SOMETHING HAPPENS
  5. 9. FOSSIL THAT IS SHORT LIVED AND WIDE-SPREAD
  6. 10. THE RULE/LAW OF _____ THAT SAYS THE CUTS ARE YOUNGER THAN WHAT IT CUTS THROUGH
Down
  1. 1. THE AMOUNT OF TIME HALF AN ISOTOPE TAKES TO DECAY
  2. 3. THE RULE/LAW OF _____THAT SAYS OLDEST ON BOTTOM YOUNGEST ON TOP
  3. 5. RADIOCTIVE SUBSTANCE USED FOR ABSOLUTE DATING
  4. 6. REMAINS OF ANCIENT CREATURES/PLANTS