Physics Y10 CROSSWORD

2. The distance between two corresponding points on a wave.
3. Heat transfer that does not need a medium and travels as waves.
5. A wave where particles move parallel to the direction of energy transfer.
9. When a wave changes direction as it enters a new medium.
10. Electromagnetic radiation released from the nucleus.
11. A wave where particles move perpendicular to the direction of energy transfer.
14. A type of radiation made of 2 protons and 2 neutrons.
16. A positively charged particle in the nucleus.
17. Heat transfer in fluids by movement of particles.
19. The maximum displacement from the wave's rest position.

1. When a wave bounces off a surface.
4. A material that reduces heat transfer.
6. When a wave spreads out after passing through a gap or around a barrier.
7. Heat transfer through solids by particle vibration.
8. A particle with no charge found in the nucleus.
12. The amount of energy needed to raise the temperature of 1 kg of a substance by 1°C.
13. The number of waves that pass a point per second.
15. The time taken for half the radioactive nuclei in a sample to decay.
18. Energy required for a substance to change state without a temperature change.