Across
- 2. the gradual change in life forms over a period of time.
- 4. imprints or remains of organisms compressed over time.
- 10. the scientists who came up with the theory of natural selection.
- 11. those animals that need both land water to survive
- 12. the type of change involved in breaking a piece of clay
- 13. the specific body part of the bird that varies depending on it's diet.
Down
- 1. a metal strip that glows brightly when burnt
- 3. organisms that are only mage up of one cell.
- 5. baking soda reacts with this to release carbon dioxide.
- 6. what form of change is the rusting of iron?
- 7. the ability to change according to the environment around and survive.
- 8. a solid that can change into a liquid.
- 9. a substance that can be set into curd.