Across
- 5. the fourth planet from the sun
- 6. is the amount of space an object occupies
- 9. the amount of matter chromosome
- 11. atoms tightly paced together
- 12. the second planet from the sun
- 13. a package of DNA.
- 15. the planet closet planet to the sun
Down
- 1. an atom that is positively charged
- 2. class the teaching of science
- 3. is a wet substance
- 4. an atom that is negatively charged
- 7. the sixth planet from the sun
- 8. the fourth planet from the sun
- 10. an atom that is a neutral charge
- 14. is the third planet away from the sun