Across
- 1. period in which amphibians first appeared
- 3. appearance of first dinosaurs
- 6. a period in which marine life first appeared (vertebrates) (fish)
- 7. the finished product of Petrification
- 9. the name for buildup of sediment
- 11. multiplication of reptile species
- 14. the item that gets fossilized
- 15. term used for 100% of a species going extinct
- 16. another word for the same type of animal
Down
- 2. the adjustment to living conditions
- 4. what happens when you look at medusa
- 5. the discharge of magma becoming lava
- 8. large flaming ball in space
- 10. the name for someone who study's fossils
- 12. the name for multiple periods of time
- 13. appearance of flowering plants