Across
- 1. Blood cells that fight infection
- 6. Particle with a negative charge
- 9. The third planet from the sun
- 10. Scientist who discovered penicillin
- 13. Law: F = ma (Last name of scientist)
- 14. A push or a pull
- 15. pH less than 7
- 16. Organism that makes its own food
- 17. The organ that pumps blood
- 20. Universal solvent
- 21. A type of reproduction involving one parent
Down
- 2. First element on the periodic table
- 3. SI unit of electric current
- 4. Acid found in vinegar
- 5. Force opposing motion
- 7. Mendeleev's famous creation
- 8. Smallest unit of life
- 9. The father of modern physics (Last name)
- 11. Tool to observe cells
- 12. The type of energy stored in food
- 18. The bending of light
- 19. Gas used in balloons that's lighter than air