Across
- 1. the moons brother
- 3. the scientists of fossils
- 4. a kind of rock where fossils are found
- 8. lightning is a form of this
- 11. 96% of marine animals and 75% of land animals disappear at this time
- 12. 50% of all animals disappear during this time
- 13. the remains of an animal that are compacted into rock
- 14. the process of bones turning into rock because of pressure
- 15. our body is filled with them
- 16. 50% of fish,sponges,corals disappear during this time
Down
- 1. a kind of layer that is stacked upon eachother and you can see the layers
- 2. disappearance of all dinosaurs
- 5. a group of the same animal
- 6. 70% of marine animals disappear at this time
- 7. the death of a huge population of species
- 9. an animals becomes better suited to it's environment
- 10. a long period of time
- 14. another word like applying force to a certain object