Across
- 5. The bending of light as it passes between materials
- 7. The height of a wave from its rest position
- 10. A negatively charged particle found in shells around the nucleus
- 12. Process where atoms gain or lose electrons to form ions
- 14. Reaction that absorbs energy from its surroundings
- 17. A positively charged particle found in the nucleus
- 18. A substance made when two or more elements are chemically joined
- 21. The amount of matter in an object
- 22. When light bounces off a surface
- 24. The flow of electric charge in a circuit
- 25. Substance present at the start of a chemical reaction
- 26. A substance that produces hydrogen ions (H⁺) in solution
Down
- 1. The rate at which an object changes its velocity
- 2. A substance that neutralises an acid to form salt and water
- 3. A neutral particle found in the nucleus
- 4. The force of gravity acting on an object's mass
- 6. A pure substance made up of only one type of atom
- 8. A charged atom that has gained or lost electrons
- 9. Substance formed as a result of a chemical reaction
- 11. The opposition to the flow of electric current
- 13. The smallest particle of an element that still has its properties
- 15. Reaction that releases energy to its surroundings
- 16. The potential difference across two points in a circuit
- 19. The number of waves that pass a point each second
- 20. A vibration that travels through air or another medium
- 23. Two or more atoms bonded together