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6. Radiation and conduction both occur in liquids
7. What are radiation and conduction both examples of?
- Light transfer
- Chemical energy
- Sound transfer
- Heat transfer
- Heat loss
8. The equation for the cost of electricity is energy input/output
9. Transformers work in..
- The grid of electriity
- The national grid
- The electricity cycle
10. Which one of these waves/rays has the highest frequency?
- Gamma rays
- Microwaves
- Radiowaves
- X-rays
- Visible light
11. EM radiation can be..
- Absorbed, reflected and transmitted
- Transmitted and absorbed
- Reflected only
- Absorbed only
- Absorbed and reflected
12. Analogue signals only have 2 values
13. Isotopes are atoms with..
- different numbers of electrons
- the same amount of electrons, neutrons and protons
- different numbers on neutrons
- different numbers of 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
17. What are radiowaves used for?
- Spying
- Weather
- Communication
- Cooking
- All of the above
18. Radioactive deacy only occurs in stable atoms