1 00:00:00,000 --> 00:00:04,000 Whoa, whoa, whoa, whoa, whoa, whoa, whoa, whoa, whoa, whoa! 2 00:00:04,000 --> 00:00:05,000 Bonjour. 3 00:00:05,000 --> 00:00:08,000 Mon nom est Alex Roberts, dans l'école Beacon Hill, 4 00:00:08,000 --> 00:00:11,000 cinq années avec Mr. O'Bain, Québec, Canada. 5 00:00:11,000 --> 00:00:12,000 Hi. 6 00:00:12,000 --> 00:00:15,000 My name is Alex Roberts, in Beacon Hill School, 7 00:00:15,000 --> 00:00:18,000 fifth grade, with Mr. O'Bain, Québec, Canada. 8 00:00:18,000 --> 00:00:19,000 Hi. 9 00:00:19,000 --> 00:00:22,000 Can you tell us more about your experiments with circuits? 10 00:00:22,000 --> 00:00:24,000 We're making different types of circuits 11 00:00:24,000 --> 00:00:26,000 using D-cell batteries, light bulbs, 12 00:00:26,000 --> 00:00:28,000 battery holders, and wires. 13 00:00:28,000 --> 00:00:30,000 What do you mean, different types of circuits? 14 00:00:30,000 --> 00:00:34,000 Our job was to experiment on different combinations of circuits 15 00:00:34,000 --> 00:00:36,000 and observe what happens. 16 00:00:36,000 --> 00:00:39,000 We made a hypothesis of what we thought would happen. 17 00:00:39,000 --> 00:00:41,000 One student made a light bulb really bright 18 00:00:41,000 --> 00:00:43,000 with two batteries and one bulb. 19 00:00:43,000 --> 00:00:46,000 Another student lit two bulbs with just one battery. 20 00:00:46,000 --> 00:00:48,000 He found out that if you unscrewed one of the bulbs, 21 00:00:48,000 --> 00:00:50,000 the other went out, too. 22 00:00:50,000 --> 00:00:52,000 This is called a series circuit. 23 00:00:52,000 --> 00:00:54,000 Aha! I was right. 24 00:00:54,000 --> 00:00:56,000 If one light bulb goes out, they all go out. 25 00:00:56,000 --> 00:00:59,000 Well, our teacher asked us to try and design a circuit 26 00:00:59,000 --> 00:01:03,000 with more than one load, like a bulb buzzer or a motor, 27 00:01:03,000 --> 00:01:06,000 that will keep on working if we remove one of the loads. 28 00:01:06,000 --> 00:01:09,000 One student drew a diagram with the same numbers of bulbs 29 00:01:09,000 --> 00:01:12,000 and batteries and used more wires going to each bulb. 30 00:01:12,000 --> 00:01:14,000 Did you try unscrewing one light bulb? 31 00:01:14,000 --> 00:01:16,000 Yes. When we unscrewed one of the bulbs, 32 00:01:16,000 --> 00:01:18,000 the other stayed lit. 33 00:01:18,000 --> 00:01:20,000 It was almost like the electricity went around 34 00:01:20,000 --> 00:01:22,000 the unscrewed bulb to get to the other. 35 00:01:22,000 --> 00:01:23,000 What? That can't be right. 36 00:01:23,000 --> 00:01:26,000 How is that different from the series circuit you made? 37 00:01:26,000 --> 00:01:28,000 In the series circuit, the electricity traveled 38 00:01:28,000 --> 00:01:30,000 in a circle through each bulb, 39 00:01:30,000 --> 00:01:33,000 but in a parallel circuit, it traveled to and around each bulb. 40 00:01:33,000 --> 00:01:35,000 Look at these two circuits. 41 00:01:35,000 --> 00:01:37,000 The first one is called a series circuit. 42 00:01:37,000 --> 00:01:39,000 It is basically a circle. 43 00:01:39,000 --> 00:01:41,000 When you remove one bulb, 44 00:01:41,000 --> 00:01:43,000 the flow of the electricity is interrupted. 45 00:01:43,000 --> 00:01:46,000 The second one is called a parallel circuit. 46 00:01:46,000 --> 00:01:49,000 The electricity goes to each resistor separately 47 00:01:49,000 --> 00:01:52,000 and bypasses the ones not connected. 48 00:01:52,000 --> 00:01:54,000 And that's the difference between 49 00:01:54,000 --> 00:01:56,000 parallel and series circuits. 50 00:01:56,000 --> 00:01:58,000 Our teacher said that we can make complex circuits 51 00:01:58,000 --> 00:02:00,000 by combining a parallel and series circuit 52 00:02:00,000 --> 00:02:02,000 into one big circuit. 53 00:02:02,000 --> 00:02:04,000 That's what we're going to try next. 54 00:02:04,000 --> 00:02:06,000 Okay, this is great information. 55 00:02:06,000 --> 00:02:07,000 Thanks for your help. 56 00:02:07,000 --> 00:02:09,000 Au revoir, les amis! 57 00:02:09,000 --> 00:02:11,000 Bye!