Across
- 3. substance made of one type of atom
- 5. bond sharing of electrons between atoms
- 7. energy stored energy
- 10. observable characteristics of an organism
- 11. selection process where better-adapted individuals survive
- 12. table chart of all known elements
- 16. thread-like structure of DNA
- 17. genetic makeup of an organism
- 18. different version of a gene
- 19. force applied over a distance
- 20. reaction releases energy
- 22. bond transfer of electrons from one atom to another
- 23. characteristic that increases survival
Down
- 1. formation of a new species
- 2. speed in a given direction
- 4. change in velocity over time
- 6. reaction absorbs energy
- 8. change in DNA sequence
- 9. carries genetic information in cells
- 10. new substance formed in a chemical reaction
- 13. energy energy of motion
- 14. substance made of two or more elements chemically bonded
- 15. starting substance in a chemical reaction
- 17. segment of DNA that codes for a trait
- 21. differences between individuals of a species