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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

  • Concrete
  • Metal
  • Wood

12. True or false: In conduction, the hotter the metal, the more kinetic transfer there is?

  • True
  • False