Across
- 2. The super continent that broke up into Laurasia and Gondwana.
- 5. Remains or traces of an organism that once existed.
- 6. The process by which organic materials become preserved as fossils, often turning into rock over time.
- 7. The process by which continents were separated causing organisms to become geographically isolated.
- 9. An important transitional fossil displaying features of both birds and reptiles.
- 11. A single ancestral species evolves into many different species as they adapt to different environments
- 12. The cumulative collection of fossils and their placement in rock formations, documenting the history of life.
Down
- 1. Existing species of ancient lineages that have not changed in form for a very long time.
- 3. The study of how continents move across the Earth, and how this directly affects the location of organisms.
- 4. The time it takes for half the radioactivity to decrease.
- 8. The fossilised remains of a life form that has traits common to two ancestral groups
- 10. Uses the amount of radioactivity remaining in the rock surrounding the fossil to determine its age.