Across
- 3. you find fossils in it.
- 4. getting use to the environment.
- 5. when a storm come there is rain thunder and lightning.
- 7. dissaperance of 96% of marine species and 75% of land species.
- 8. you find this bone/rock in a sedimentary-rock.
- 9. disappearance of more than 50% of fish,sponges and corals.
- 10. dissaperance of about 50% of animal species.
- 13. when all of a species die.
- 14. a group of living organisms consisting of similar individuals.
Down
- 1. when this thing blows up it releases magma and smoke.
- 2. dissaperance of dinosaurs.
- 3. is a layer that is made up of sedimentary deposits.
- 6. a long and distinct period of history.
- 11. dissaperance of 70% of marine species(corals and fish).
- 12. it is big,round and hot.
- 13. naturally occurring substance.