Across
- 4. It means "Age of Reptiles", and is also the era where the dinosaurs got extinct.
- 6. It's a major division of time
- 12. A widespread, and rapid decrease in the biodiversity on Earth.
- 13. Appearance of the lineages of almost all animals living today. (2 words)
Down
- 1. It's the cause of dinosaur extinction
- 2. 66 million years ago to present, first monkeys and apes
- 3. It proposes that species evolve quickly during relatively short periods. (2 words)
- 5. It's a standardized system for organizing the history of the Earth into specific time intervals, based on the ages of rocks, fossils, and other geological formations. (3 words)
- 7. It spans from 544-245 million years ago. Includes invertebrate sea animals.
- 8. It's the epoch in today's time
- 9. It's the result of the movement of tectonic plates on the convection currents in the mantle.
- 10. It's earliest era of earths history, covering the first 4 billion years
- 11. Refers to a pattern of sustained, directional, and incremental evolutionary change over a long period of time during the history of a species