Across
- 1. radioactive ____ is the unwanted presence of radioactive atoms on other materials (13)
- 3. a semiconductor whose resistance is temperature dependent (10)
- 8. the A in LASER (13)
- 11. this decay occurs in very large nuclei (5)
- 12. ____ energy: energy sources that can be replenished at the rate they are used (9)
- 14. this flavour of quark is the heaviest known elementary particle (3)
- 16. one joule per Coulomb (4)
- 19. on this planet, the sun would appear 3 times larger than it does on Earth (7)
- 21. the explosion of a red supergiant (9)
- 22. a single force representing the sum of all the forces acting on an object (9)
- 23. the rate of flow of electrical charge (7)
- 25. potential difference is____ in series circuits (6)
- 26. like charges ____ (5)
- 29. the earliest stage in the life cycle of a star (9)
- 30. a device which generates a DC supply using the generator effect (6)
Down
- 2. every particle has a corresponding ____ (12)
- 4. 1 x 10^-10 metres is the typical ____ of an atom (6)
- 5. 10^-15 m (10)
- 6. changing shape, it can be elastic or inelastic (11)
- 7. the resultant colour after mixing blue and green light (4)
- 9. SI base unit named after a British physicist (6)
- 10. the second largest planet in our solar system (6)
- 13. the colour of the neutral wire (4)
- 15. changes of state are ____ changes, making them reversible (8)
- 17. the ____ force is the weakest of the fundamental forces (13)
- 18. decay mediated by W + or – bosons (4)
- 20. Newton’s ____ law: F = ma (6)
- 24. the ____ wire only carries current when there’s a fault (5)
- 27. electrons in an atom lie in discrete ____ levels (6)
- 28. nuclear ____ is when an atomic nucleus splits to form 2 smaller nuclei (7)