Across
- 2. The time taken for the radioactivity of a specified isotope to fall.
- 5. The animal decays and leaves behind a thin layer of carbon.
- 8. Evidence found as a footprint or so.
- 9. A hollow container used to give shape
- 10. Fossil used to dating.
- 12. The spontaneous transformation of an unstable atomic nucleus into a lighter one, in which radiation is released in the form of alpha particles, beta particles, gamma rays, and other particles.
- 13. When magma hardens on the Earth's surface.
- 15. Fossil that has been taken over by minerals.
Down
- 1. Any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive.
- 3. Exact year
- 4. Not an exact year
- 6. An object made by shaping
- 7. Animals that were hardened in Ice, Amber and Tar.
- 11. When magma hardens within the Earth's surface.
- 14. Something found in the ground showing evidence from the past.