Across
- 1. small amount of light can pass through, can see objects through surface but not clearly
- 5. upside-down
- 6. the process of burning something
- 8. the changing of one element into another by radioactive decay
- 11. time required for half the atoms in a radioactive isotope to decay
- 13. to make a copy of
Down
- 1. can see through clearly
- 2. a scale used to classify something
- 3. coming after something in time/following
- 4. to separate
- 6. to come together
- 7. to become less severe
- 9. a transparent object that breaks white light into color spectrum
- 10. not letting light through
- 12. Center, in the middle