13. 1.Which statement about sound energy is not true ? A. Sound energy can be detected by our ear B. Sound energy can travel through water C. Sound energy can travel through a vacuum D. Sound energy is produced by a vibrating object 2.A bulb will light up when the switch is on. What is the energy change that takes place ? A. There is no energy change B. Electrical energy changes to heat energy C. Electrical energy changes to light energy only D. Electrical energy changes to heat energy and light energy

14. 3.What is the form of energy that enables us to see an object ? A. Sound energy B. Heat energy C. Light energy D. Electrical energy 4.Which appliances changes electrical energy into light and sound energy ? A. Television B. Alarm clock C. Radio D. Telephone

15. 5. What type of energy change occurs when a ball is kicked ? A. Kinetic energy potential energy B. Potential energy kinetic energy C. Chemical energy potential energy D. Potential energy chemical energy 6. Which appliances transform electrical energy into heat energy ? I II III IV A. II and III only B. II and IV only C. I, II and III only D. I, II, III and IV

16. Section B Siti carried out an investigation to study the transformation of energy when electric current flows through a light bulb. She prepared the following circuit and switched it on. She touched the light bulb. a. State what she felt when she touched the light bulb. ______________________________________________________ b.Give a reason to support your answer in (a). _____________________________________________________

17. c. State the transformation of energy that occured in the circuit. ___________________________________________________ d. Name an appliance that make use of the same transformation of energy. __________________________________________________

18. GOOD LUCK THANK YOU