Activa JavaScript para disfrutar de los vídeos de la Mediateca.
Explanding Universe Activity - Contenido educativo
Ajuste de pantallaEl ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:
NASA Connect Segment involving students in an activity to create a model of the explanding galaxy with a balloon. It explains how scientists use models for observation and how to plot and analyze data using graphs.
Hey, how would you like to create a model of our universe using something as simple as a balloon?
00:00:00
Hi, we're from Fort Washakie School in Fort Washakie, Wyoming.
00:00:05
We live on the Wind River Indian Reservation in Central Wyoming.
00:00:10
We enjoy spending time in the Wind River Mountains, which tower behind our home.
00:00:14
Our community consists of many Native American tribes,
00:00:18
but most of us are members of the Shoshone tribe.
00:00:22
We are proud of our heritage and we celebrate by participating in powwows and traditional
00:00:25
ceremonies. We also take pride in our arts and crafts that we have learned from our elders.
00:00:30
NASA Connect asks us to help you understand this show's student activity.
00:00:36
In this lesson, you'll learn about our expanding universe.
00:00:40
You'll also learn how scientists use models to understand observations,
00:00:44
and you'll get to plot and analyze data that you'll get from taking
00:00:48
distance measurements between objects in your own universe.
00:00:51
You see, we'll use an analogy to try to explain a very complex concept.
00:00:54
What's an analogy?
00:00:59
It's simple, really. It's a comparison.
00:01:01
For example, sometimes I say my big brother is like a vacuum cleaner when he eats.
00:01:03
I use the vacuum cleaner as an analogy to try to explain his eating habit.
00:01:08
You're going to use an analogy for the universe to help you understand the idea that it is expanding.
00:01:14
When I look out into space, I really don't see anything expanding.
00:01:21
It's too big.
00:01:25
So we'll use something like the universe to help us understand
00:01:27
one of its characteristics that we cannot easily see.
00:01:30
A good analogy for the universe expanding would be a loaf of raisin bread baking in the oven.
00:01:33
As the loaf expands, the raisins move away from each other.
00:01:39
The raisins represent galaxies and the bread represents space.
00:01:43
This is kind of like what happens in the universe.
00:01:47
Another analogy for the expansion of the universe is a balloon.
00:01:50
Things that exist on the surface of a balloon, for example,
00:01:55
these marks move further apart as the balloon is blown up.
00:01:58
In just a minute, we're going to measure the distance between points on a balloon
00:02:02
when it is about the size of a grapefruit,
00:02:06
then again when it is blown up to about the size of your head.
00:02:08
Before we do that, here's something you must understand about an analogy.
00:02:11
It's only like what it is compared to in a certain way.
00:02:16
The balloon is not the universe, in other words.
00:02:20
In fact, the surface of a balloon is only two-dimensional,
00:02:23
not three-dimensional like the universe.
00:02:26
It would be very hard to measure something inside the balloon
00:02:29
because, well, we can't get inside of it.
00:02:32
Because we can measure the distance between points on the surface of a balloon,
00:02:35
that's what we'll do to verify what Hubble discovered about the universe.
00:02:39
He found out the further away a space object is from us,
00:02:43
the faster it is moving away from us.
00:02:46
Now that you understand about the universe expanding
00:02:49
and how we use models and analogies to describe it,
00:02:51
you're ready to do the lesson.
00:02:55
Separate into groups, then expand your balloon to about the size of a grapefruit.
00:02:57
Roll the neck of the balloon making three turns toward the expanded portion.
00:03:02
Secure it with a binder clip to keep air from escaping.
00:03:06
Mark a point near the balloon's equator.
00:03:09
Label the first point as home.
00:03:12
Starting from home, measure 10 millimeter intervals along the balloon's equator
00:03:14
and mark five points.
00:03:19
Label each point starting with the number one.
00:03:20
Measure again the distance to point number one from home.
00:03:23
Be sure no air has escaped.
00:03:27
Record the distance from home to each point.
00:03:29
Be careful not to compress or dent the balloon while making the marks.
00:03:32
Expand the balloon to about the size of your head.
00:03:36
Measure the new distance from home to each point
00:03:39
and record the result.
00:03:42
Be careful not to compress or dent the balloon while making the measurements.
00:03:44
Calculate the distance each point moved
00:03:48
by subtracting its first recorded distance from home
00:03:51
from the second recorded distance.
00:03:54
Have someone check the calculations.
00:03:57
Record the results on the data sheet.
00:04:00
Now divide the distance each point traveled by the time it took
00:04:03
or when epoch to get the expansion rate.
00:04:07
This is the rate of expansion of your balloon.
00:04:10
Record the results for each point on the data sheet.
00:04:13
Now you're ready to plot your data.
00:04:17
Using the data from the universe data sheet, plot the points.
00:04:20
Distance traveled, expansion rate.
00:04:24
Team members should verify that the points are plotted correctly on the graph.
00:04:26
So what conclusions can you make from this lesson?
00:04:34
Alpha 1R graph looks just like the Hubble data graph.
00:04:37
We created a pretty good model for the expansion of space.
00:04:41
Our data shows a linear pattern like the Hubble data.
00:04:44
That's great! Any other thoughts about this lesson?
00:04:48
We learned how to use the metric system.
00:04:52
Science is fun.
00:04:55
How the universe expands.
00:04:57
Way to go guys! You did a great job.
00:04:59
Hey teachers, check out our NASA Connect website
00:05:02
and download the lesson guide from this program.
00:05:04
You'll find this student activity, data analysis questions,
00:05:07
extension activities, and tons more.
00:05:11
- Valoración:
- Eres el primero. Inicia sesión para valorar el vídeo.
- 1
- 2
- 3
- 4
- 5
- Idioma/s:
- Materias:
- Matemáticas
- 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:
- 160
- Fecha:
- 28 de mayo de 2007 - 16:52
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 05′ 14″
- 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:
- 31.54 MBytes