Across
- 4. a structure or behavior that helps an organism survive in its environment
- 6. the living and non-living things that interact in an environment
- 7. a material or object that a living thing uses to survive
- 8. the struggle among organisms for water, food, or other resources
- 10. the death of all of one type of living thing
- 11. the shape of the organism that has become fossil
- 13. to rest or go into a deep sleep through the cold winter
- 14. to move from one place to another
- 15. the outline that can be filled with another type of material
Down
- 1. an organism that is introduced into a new ecosystem
- 2. fossil a recording trace of a once-living organism
- 3. the trace or remains of a living thing that died long ago
- 5. actual remains of an organism
- 9. an adaptation in which one kind of organism looks like another kind in color and shape
- 12. an adaptation that allows an organism to blend into its environment