Across
- 2. The preserved remains of organisms whose bodies were buried in sediments
- 5. Era that was 541-252 million years ago, "Ancient Life"
- 6. A long and distinct period of history with a particular feature or characteristic.
- 9. Calender of Earth's history to represent evolutionary time
- 10. The science that deals with the earth's physical structure, substance, and history,
- 12. An organism's body/bones after death
Down
- 1. Era that was 251.9 to 66.0 million years ago, was the "Age of Reptiles
- 3. The release of energy from the decay of the nuclei of certain kinds of isotopes.
- 4. What casts are made of, the cast forms a fossil
- 7. To keep something as it is, especially to prevent it from decaying or being damaged or destroyed
- 8. The most recent era, 66 MYA to today, "Age of Mammals"
- 11. Isotopes are distinct nuclear species of the same chemical element