Across
- 5. rocks that are made from other rocks
- 8. an explanation for why or how things happen based on scientist's observations of the world
- 10. the traits or behaviors that enables an organism to adjust to their environment
- 12. organisms that are best suited to their environment survive and pass on their traits
Down
- 1. all the known fossils and their placement in the formation of rocks
- 2. a group of similar organisms that can breed and reproduce fertile offspring
- 3. breeding of plants and animals to produce desirable traits
- 4. a process of change over time
- 6. no living members of this species exist
- 7. all the members of a species that live in a particular area
- 9. a mistake or a change in a living thing's DNA
- 11. the difference in DNA among individuals of the same species