Across
- 5. all living things need matter and...
- 9. when large groups of species die out
- 10. the time period that saw a huge explosion in biodiversity
- 12. the genetic code found in all living things
- 13. water sticks to other charged substances
- 14. all living things are made of
- 15. observations that are not number based
- 17. water molecules form these kinds of bonds between themselves
- 18. an observation that is NOT opinion based
Down
- 1. the state of internal balance that must be maintained by all life forms
- 2. water sticks to water
- 3. early life forms produced this gas by photosynthesis
- 4. an observation that is based on opinion
- 6. a dog and her puppies is an example of...
- 7. water molecules has slight charges to them which makes them _____
- 8. this group of organisms was alive at the same time as the dinosaurs
- 11. number based observations
- 16. as a group, species can do this over time
- 19. in science we write ____ based claims