lightupscience(科学)3b课件unit3electricitylesson1circu

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1、 UNIT 3 电 What makes the bulbs light? What makes the toy go? What moves through the wires? Say it if you know! battery (电池 ) bulb (灯泡 ) complete circuit (闭合回路 ) electricity (电 ) wire (导线 ) Lesson 1 Circuits What makes the car run? The batteries make the car run. computer fan lamp Which objects use e

2、lectricity? Tick ( ). pencil torch desk Here is a bulb, a battery and some wires. Can you make the bulb light? If the bulb lights, the circuit is a complete circuit. Electricity can only go through a complete circuit. A complete circuit has no gaps. Draw your results. Compare the two circuits. Tick

3、( ) or cross ( ). Does the bulb light? Does it have gaps? Is it a complete circuit? Electricity can go through only a complete circuit. A complete circuit has no gaps. I made a complete circuit. I compared circuits. I saw electricity. What do you need to make a complete circuit? Draw lines. Look at this circuit with a buzzer. Is it a complete circuit? How can you stop the buzzer noise? Talk with your friends. Which are complete circuits? Tick ( ).