Across
- 3. Bacterial disease spread through water
- 9. The outer layer of a plant cell
- 11. Particle with a negative charge
- 12. Disease spread by mosquitos
- 13. Type of drug that kills bacteria
- 15. Process of cell division that makes 2 new cells
- 16. Cell that carries electrical signals in the body
- 18. Uncharged particle in the nucleus of an atom
- 20. Theory proposed by Charles Darwin
- 22. A row in the periodic table
- 23. Allotrope of carbon that is very valuable
Down
- 1. Type of bond between non-metals
- 2. The maximum number of electrons in the second shell of an atom
- 4. Added to a microscope specimen to make it easier to see
- 5. State change from solid to liquid
- 6. The part of a microscope that you look though
- 7. What happens to an enzyme when it gets too hot
- 8. A biological catalyst
- 10. A column in the periodic table
- 14. The junction between neurones
- 17. The genetic information stored in the nucleus
- 19. Virus that affects the immune system
- 21. Type of bond between a metal and non-metal