Across
- 4. Molecule inside the cells that contains the genetic information
- 5. Sand or quartz grain compressed together
- 6. preserved remains, impressions, traces
- 9. Gases surrounding earth
- 11. The natural environment of animals and plants
- 12. rock Formed
- 17. A structure found inside the nucleus of the cell
- 18. The rocks and minerals on earth
- 20. Fine-grained sedimentary rock
Down
- 1. The set of observable characteristics
- 2. Body waves that are reflected twice by the same reflection
- 3. All the living organisms on earth
- 7. Hot molten
- 8. a process by which water circulates
- 10. the water on earth
- 13. The genetic constitution of a individual organism
- 14. Thin wire in a electrical bulb
- 15. the distance between a crest and trough
- 16. the variety of organisms in a particular area
- 19. Power or energy