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Circuit Activity

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Why? Files segment involving students in an activity studying circuits and how the different types and combinations of circuits work.

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Whoa, whoa, whoa, whoa, whoa, whoa, whoa, whoa, whoa, whoa! 00:00:00
Bonjour. 00:00:04
Mon nom est Alex Roberts, dans l'école Beacon Hill, 00:00:05
cinq années avec Mr. O'Bain, Québec, Canada. 00:00:08
Hi. 00:00:11
My name is Alex Roberts, in Beacon Hill School, 00:00:12
fifth grade, with Mr. O'Bain, Québec, Canada. 00:00:15
Hi. 00:00:18
Can you tell us more about your experiments with circuits? 00:00:19
We're making different types of circuits 00:00:22
using D-cell batteries, light bulbs, 00:00:24
battery holders, and wires. 00:00:26
What do you mean, different types of circuits? 00:00:28
Our job was to experiment on different combinations of circuits 00:00:30
and observe what happens. 00:00:34
We made a hypothesis of what we thought would happen. 00:00:36
One student made a light bulb really bright 00:00:39
with two batteries and one bulb. 00:00:41
Another student lit two bulbs with just one battery. 00:00:43
He found out that if you unscrewed one of the bulbs, 00:00:46
the other went out, too. 00:00:48
This is called a series circuit. 00:00:50
Aha! I was right. 00:00:52
If one light bulb goes out, they all go out. 00:00:54
Well, our teacher asked us to try and design a circuit 00:00:56
with more than one load, like a bulb buzzer or a motor, 00:00:59
that will keep on working if we remove one of the loads. 00:01:03
One student drew a diagram with the same numbers of bulbs 00:01:06
and batteries and used more wires going to each bulb. 00:01:09
Did you try unscrewing one light bulb? 00:01:12
Yes. When we unscrewed one of the bulbs, 00:01:14
the other stayed lit. 00:01:16
It was almost like the electricity went around 00:01:18
the unscrewed bulb to get to the other. 00:01:20
What? That can't be right. 00:01:22
How is that different from the series circuit you made? 00:01:23
In the series circuit, the electricity traveled 00:01:26
in a circle through each bulb, 00:01:28
but in a parallel circuit, it traveled to and around each bulb. 00:01:30
Look at these two circuits. 00:01:33
The first one is called a series circuit. 00:01:35
It is basically a circle. 00:01:37
When you remove one bulb, 00:01:39
the flow of the electricity is interrupted. 00:01:41
The second one is called a parallel circuit. 00:01:43
The electricity goes to each resistor separately 00:01:46
and bypasses the ones not connected. 00:01:49
And that's the difference between 00:01:52
parallel and series circuits. 00:01:54
Our teacher said that we can make complex circuits 00:01:56
by combining a parallel and series circuit 00:01:58
into one big circuit. 00:02:00
That's what we're going to try next. 00:02:02
Okay, this is great information. 00:02:04
Thanks for your help. 00:02:06
Au revoir, les amis! 00:02:07
Bye! 00:02:09
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Idioma/s:
en
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
536
Fecha:
28 de mayo de 2007 - 15:34
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
02′ 12″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
13.35 MBytes

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