Across
- 3. the _____ Effect is what happens to sound waves when a sound source moves relative to the observer
- 5. The light from stars coming towards us appears ________
- 7. when waves spread out as they pass through a gap
- 9. an example of renewable energy using hot rocks
- 13. The name given to the ray of light that hits a mirror
- 14. the spectrum of waves which travel at the same speed as light through a vacuum
- 17. energy carried by a wave
- 19. a phenomenon which provides evidence for the Big Bang
- 20. In a fossil fuel power station, a turbine turns a _______
Down
- 1. Multiplying frequency and wavelength gives wave _______
- 2. an EM wave used in communication and cooking
- 4. can step up or step down voltage
- 6. type of wave where the vibrations and the direction of travel are the same
- 8. number of waves per second
- 10. An example of a transverse wave used in optical fibres
- 11. When light bends as it enters a different medium due to a change in speed
- 12. name for the type of gases given off when fossil fuels are burnt
- 15. The Big Bang theory states the universe is _______
- 16. the top of a wave
- 18. A sound with a high frequency has a high _________