Across
- 2. the age of the dinosaurs
- 3. the period in which the dinosaurs came to an end and mammals took center stage
- 5. was a 20th century vertebrate paleontologist who focused on the study of dinosaurs
- 7. the period in which glaciers had formed in the pole
- 9. the trace or remains of organisms that lived long ago
- 11. some meteorites contained this
- 15. fossils a fossil used to date other fossils
- 17. these continents collided at the equator
- 20. the largest division of geological time
- 21. the scientific study of fossils
- 25. this animal lived in the Ice Age
- 26. the period where life first evolved
- 27. a unit of geological time into which eras are divided
- 28. a type of fossil that forms when sediments fill in the cavity left by a decomposed organism
- 29. a unit of geological time that includes two or more periods
Down
- 1. the ship that Charles Darwin voyaged on
- 4. the standard method used to divide the Earths history into manageable parts
- 6. there were 4 of these in all time
- 8. a principal that states the geoligical process that occured in the past can be explained by current geological processes
- 10. a subdivision of a geological period
- 12. the man who said we originate from apes(the evolution of theory)
- 13. the land mass made from the collided continent
- 14. the period in which earth turned green and started to grow plants
- 16. the period of swampy forest
- 18. the period in which hominids appear
- 19. a principal that states the geologic change occurs suddenly
- 20. the death of every member of a species
- 21. the period in which the continents came together
- 22. fossil a fossilized mark that is formed in soft sediment by the movement of an animal
- 23. a mark or cavity made in a sedimentary surface by a shell or other body
- 24. this period was in the ocean