End of Year 10 Physics Crossword

2. First word of the term for energy needed to raise temperature of 1kg of substance by 1°C. (8)
6. Sound waves with frequencies above 20,000 Hz. (9)
12. Transfer of heat through the movement of fluids. (10)
13. A type of nuclear radiation consisting of a high-speed electron. (4)
18. Transfer of energy by electromagnetic waves. (9)
19. A safety device that melts if the current is too high. (4)
20. The time it takes for half of a radioactive substance to decay. (8)
23. A type of nuclear radiation consisting of two protons and two neutrons. (5)
24. A material that does not allow electricity to flow easily. (9)
25. High-frequency electromagnetic radiation emitted from nuclei. (5)
27. A measure of how much a component opposes current. (10)
28. The maximum displacement of a wave from its rest position. (9)
29. A conductor that has a constant resistance when temperature is constant. (5)
30. A type of current that changes direction repeatedly. (10)

1. A wave where the vibrations are parallel to the direction of wave travel. (12)
3. Transfer of energy through collisions between particles. (10)
4. The distance between two corresponding points on a wave. (10)
5. Mass per unit volume of a substance. (7)
7. Energy stored due to an object's position or configuration. (9)
8. First word of the term for energy needed to change state without changing temperature. (6)
9. Unwanted presence of radioactive material on surfaces. (13)
10. Exposure to radiation without direct contact. (11)
11. The bending of a wave as it changes speed moving from one medium to another. (9)
14. Force applied per unit area. (8)
15. When a wave bounces off a surface. (10)
16. The ratio of useful output energy to total input energy. (10)
17. First word of the law stating pressure is inversely proportional to volume. (6)
21. Atoms of the same element with different numbers of neutrons. (7)
22. The number of wave cycles per second. (9)
26. First word of the grid that connects power stations to consumers. (8)