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III. Choose the letter of the best answer.
1. What is the heart of any power plant that converts mechanical energy into electrical energy? A. Electricity B. power C. turbines D. Appliances 2. Which of these is NOT a precautionary measures in using electricity? A. Avoid octopus connections. B. Check all the wirings of your appliances. C. Do not place appliances close to water sources. D. Leave all appliances on when having a vacation for a long time. 3. What happens when heat is absorbed by an object. A. It turns into sound energy. B. it turns into kinetic energy C. it turns into thermal energy D. it turns into mechanical energy 4. What happens when a spoon absorbs heat? A. Its molecules vibrate faster. B. Its molecules vibrate gently. C. Its molecules stop vibrating. D. Its molecule vibrate slower. 5. Light energy cannot move objects on its own. It is transformed to what form of energy in order to make thinga move? A. Kinetic energy B. potential energy C. Mechanical energy d. Electrical Energy 6. Which of the following shows an example of elastic energy? A. A rolling wheel and pestle b. a pressed spring d. a falling debris c. pounding mortal D. a falling debris
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