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Parallax Activity

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Sci Files segment involving students in an activity to learn how to measure distances in space by using parallax.

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Hey guys, I'm at my cousin's school, the Antonio González Suárez Bilingual School in Oñasco, Puerto Rico. 00:00:00

They're doing an experiment in their teacher, Ms. Alice Acevedo's science class, learning how to measure distances in space. 00:00:06

Cool! Dr. D just told us about the great distances in space. 00:00:13

Can we take a closer look? 00:00:17

Sure, I'd like Kim and I to tell you all about it. 00:00:18

Las puertas decía a mis amigos que están haciendo este experimento. 00:00:21

Hola amigos, mi nombre es Kimberly. 00:00:27

Oh, perdóname. I'm sorry, I'm Kimberly. 00:00:29

And I'm Ida Cortés. 00:00:32

We're here today with our mentors, Brenda Fuentes, Alexis Alicea, Carmen Garcia, and Yadeli Claudio from the Society of Women Engineers. 00:00:33

They are assisting us with a parallax experiment to help us understand how astronomers measure distances in space. 00:00:45

Excuse me, we need to listen to my teacher for a minute. 00:00:51

Hoy estaremos realizando en nuestra clase de ciencia un experimento que es utilizado por los astronautas sobre los equivalentes paralelos en el espacio. 00:00:55

Okay, I'm back. What's parallax? 00:01:04

It's the apparent change in the position of an object. 00:01:07

Try this. Hold your thumb out in front of you and close one eye, then close the other eye. 00:01:10

Looks like my thumb is moving. That's neat. 00:01:16

Even though your thumb really didn't move, it looked like it did. And that's parallax. 00:01:20

So how does the experiment work? 00:01:24

First, we lay out our baseline of rope, 10 meters long. One end is marked A and the other end is B. 00:01:26

Then we place an object not more than 25 meters away from the baseline. 00:01:32

I know this is a protractor, but how is it going to help you measure distance? 00:01:37

You sit on the baseline at point A and make sure that the protractor is parallel with the rope. 00:01:41

Why did you put the pencil on the vertex? 00:01:46

Putting it there helps you line the object up as you look at it. 00:01:48

What comes next? 00:01:52

Now move another pencil around the outer edge of the protractor until it lines up with the object. 00:01:54

How do you read the protractor? 00:02:00

Your partner will actually read it for you and record the angle. 00:02:02

Next, we move to the other end and repeat the steps. 00:02:06

Notice how the flagpole seems to have changed its position and appears as a different angle. 00:02:09

Now what do you do with your data? 00:02:15

Plot it on graph paper. Draw a 10 centimeter baseline at the bottom of the paper and then draw in our angles. 00:02:17

Do the two lines intersecting mean anything? 00:02:24

Yes, it is telling us the distance that the object is from the baseline. 00:02:27

How do you determine the distance? 00:02:31

Draw a perpendicular line from the point of intersection to the baseline and then measure it. 00:02:33

What's the scale? 00:02:38

We use the scale that means 1 centimeter on the graph paper equals 1 meter outside. 00:02:40

I get it. So if the line measures 15 centimeters, the distance from the object is 15 meters. 00:02:45

Astronomers are able to see on a parashift the nearby stars as the Earth revolves around the Sun. 00:02:51

That's really interesting. 00:02:57

And thanks to the Society of Women Engineers for providing us with mentors. 00:02:59

Visit the NASA Sci-Fi's website to learn how to get your own classroom mentors. 00:03:03

Thanks, Kim and Ida. I've got to go to my next meeting. 00:03:08

¿Qué hora es? 00:03:11

It's 3 p.m. 00:03:12

I'd better run. Adios, amigas. 00:03:14

Adios. 00:03:16

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Autor/es:

NASA LaRC Office of Education

Subido por:

EducaMadrid

Licencia:

Reconocimiento - No comercial - Sin obra derivada

Visualizaciones:

495

Fecha:

28 de mayo de 2007 - 15:34

Visibilidad:

Público

Enlace Relacionado:

NASAs center for distance learning

Duración:

03′ 17″

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: