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6. Radiation and conduction both occur in liquids

  • False
  • True

7. What are radiation and conduction both examples of?

  • Heat loss
  • Light transfer
  • Sound transfer
  • Heat transfer
  • Chemical energy

8. The equation for the cost of electricity is energy input/output

  • False
  • True

9. Transformers work in..

  • The national grid
  • The electricity cycle
  • The grid of electriity

10. Which one of these waves/rays has the highest frequency?

  • Gamma rays
  • Radiowaves
  • Microwaves
  • Visible light
  • X-rays

11. EM radiation can be..

  • Reflected only
  • Absorbed, reflected and transmitted
  • Absorbed only
  • Absorbed and reflected
  • Transmitted and absorbed

12. Analogue signals only have 2 values

  • False
  • True

13. Isotopes are atoms with..

  • different numbers of protons
  • different numbers of electrons
  • different numbers on neutrons
  • the same amount of electrons, neutrons and protons

14. What is the process called in which the universe began?

  • Red shift
  • The big bang
  • Nuclear fusion

15. Convection occurs in..

  • gas and liquids
  • liquids
  • solids
  • gases
  • gas and solids

16. Only cookers are 100% efficient

  • False
  • True

17. What are radiowaves used for?

  • Communication
  • Weather
  • All of the above
  • Cooking
  • Spying

18. Radioactive deacy only occurs in stable atoms

  • False
  • True