2. Question 1 – What does energy efficiency measure?
A. How quickly a device transforms energy
B. How well the input energy is transformed to useful energy
C. How much energy is transformed to heat energy
D. How much energy is put in to a device

3. Question 2 - Which of these is not usually a wasted energy?
A. Heat
B. Electrical energy
C. Sound
D. Light

4. Question 3 - Which type of energy is ALWAYS lost in energy transfers / transformations?
A. Heat
B. Sound
C. Light
D. Potential

5. Question 4 – Which of these is the input energy for humans?
A. Kinetic
B. Heat
C. Chemical
D. Electrical

6. Question 5 – An iron usefully transforms 100 J of electrical energy in to 60 J of useful heat energy. What is it’s efficiency?
A. 0.4
B. 60 J
C. 40 J
D. 0.6

7. Question 6 – Which energy type is the input energy of an iPod?
A. Heat
B. Electrical
C. Light
D. Chemical

8. Question 7 – Which of these is not a useful output energy of a television
A. Light
B. Heat
C. Sound

9. Question 8 – Which of these is not an environmental reason to use energy efficient devices?
A. Reduces the amount of CO2 produced
B. Saves money
C. The effects of global warming are reduced

10. Question 9 – What is meant by the conservation of energy?
A. Energy cannot be destroyed or created
B. Energy can be destroyed but it can’t be created