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6. What is frequency (of a wavelength) measured in?
- Hertz (Hz)
- Joules (J)
- Kilometres (Km)
7. Advantage of solar panels:
- Work all year round
- Renewable source
- Cheap
8. What is a laser?
- A beam of light
- Optic fibrosis
- A remote control
9. Which seismic wave can only go through solids?
- S-waves
- P-waves
- Microwaves
10. What is it called when the waves spread out after they've passed through a gap?
- Diffraction
- Reflection
- Conduction
11. Name a good conductor
12. True or false: In conduction, the hotter the metal, the more kinetic transfer there is?