Science Crossword

12345678910111213141516
Across
  1. 2. Negative charge
  2. 4. Original isotope
  3. 6. smallest whole piece of matter
  4. 8. 92 are naturally occuring on Earth
  5. 10. summary of major events in all of Earth's past that are preserved in the rock record
  6. 11. relative order without determining their absolute age
  7. 12. very powerful radiation, can damage DNA
  8. 13. nucleus vibrates until protons or neutrons are rejected to reach equalibrium
  9. 15. time it takes for a half the radioactive element to decay into a stable element
  10. 16. No Charge
Down
  1. 1. atom of the same element that have a different number of neutrons
  2. 3. the process by which radioactive isotopes give off or capture parts of the atom
  3. 4. positive cahrge
  4. 5. vertical column of rock that demonstrates the Law of Superposition and can include fossils
  5. 6. procedures a numerical age
  6. 7. stronger radiation, can penetrate human skin
  7. 9. the conversion of an atom of one element to an atom of another
  8. 14. very weak radiation, won't penetrate paper