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Systems - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect segment explaing basic facts about systems and subsystems. The video also introduces the study of Earth System Science.

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Hi, I'm Jennifer Pulley, and welcome to NASA Connect, the show that connects you to math, 00:00:00
science, technology, and NASA. 00:00:08
We're here in sunny Virginia Beach, which is located in Virginia's tidewater region. 00:00:11
Now, in case you're not familiar with where Virginia Beach or Virginia's tidewater region 00:00:16
is located, let's take a look at a bird's eye view of our location. 00:00:21
Virginia Beach is in the tidewater region, located in southeastern Virginia. 00:00:26
Virginia is part of the United States, which we all know is part of North America. 00:00:31
The continent of North America is one of the seven continents on the planet Earth. 00:00:36
Doesn't it appear that we are all interconnected in some way? 00:00:41
On a global scale, have you ever wondered how the Earth really works? 00:00:46
Now here, we can see the ocean, the beach, and the sky, not to mention all the people, 00:00:50
animals, and marine life. 00:00:55
They all play important roles in determining how our planet works. 00:00:57
We can say that the Earth is whole, meaning that everything on the planet, inside and 00:01:01
out, is interconnected. 00:01:06
Say, do you know the branch of science that deals with studying how the Earth works? 00:01:08
Well, if you said Earth science, you're getting warm. 00:01:13
Scientists have established a new field of science called Earth System Science. 00:01:18
The Earth is a system of individual parts that work together as a complex whole. 00:01:22
Now in order to understand this concept, we need to know what a system is, and we'll get 00:01:28
to that in a minute. 00:01:32
But first, throughout the program, you will be asked several inquiry-based questions. 00:01:33
After the questions appear on the screen, your teacher will pause the program to allow 00:01:39
you time to answer and discuss the questions. 00:01:43
This is your time to explore and become critical thinkers. 00:01:46
Students, take a few minutes to answer and discuss the following questions. 00:01:49
What is a system? 00:01:54
What are some examples of a system? 00:01:55
Choose one system and draw a picture with its parts labeled. 00:01:59
It's now time to pause the program. 00:02:03
So what is a system? 00:02:06
We use the word system when we want to describe something that is made up of different kinds 00:02:08
of parts. 00:02:12
These parts join together to form an interconnected whole. 00:02:13
Is your definition similar to this one? 00:02:17
Learning to think systematically is very useful because all sorts of systems surround us. 00:02:20
In fact, each of us is our own complex system. 00:02:26
For example, each of us is made up of more than 200 kinds of cells. 00:02:30
These skin, bone, blood, gland, nerve, and muscle cells all join together to form an 00:02:35
incredible system, an individual human person. 00:02:42
Looking at ourselves as a system reveals two important features of systems. 00:02:46
One, each part of a system can itself be described as a smaller system or subsystem. 00:02:50
Two, a system can be very different from its parts. 00:02:57
Let's look at the first feature. 00:03:01
Each part of a system can also be described as a subsystem. 00:03:03
One of the parts of a human system is the circulatory system. 00:03:07
This system moves blood throughout your body. 00:03:11
However, the circulatory system itself is a system with many parts. 00:03:13
The parts of the circulatory system include the heart, veins, arteries, and blood cells. 00:03:18
The heart is also a system made of parts. 00:03:24
These include muscle cells, nerve cells, and valves. 00:03:27
You can go even further and concentrate on the heart muscle cell. 00:03:31
The heart muscle cell is made of a cell membrane, cell nucleus, and many different proteins. 00:03:35
You could go crazy breaking down all those systems. 00:03:42
And you know, in case you didn't realize, we are not the biggest system around. 00:03:44
The human system is actually part of the system of life, which is part of the planet Earth. 00:03:48
And the planet Earth is part of the solar system. 00:03:53
Are you with me so far? 00:03:57
So you see, each part of a system can itself be described as a system. 00:03:59
The second system feature states that a system can be very different from its parts. 00:04:04
A school bus is another example of a system. 00:04:09
A school bus has hundreds of parts, such as the frame, engine, wheels, gas tank, and seats. 00:04:12
Individually, none of these parts will get you from your home to school and back. 00:04:19
Joined together as an interconnected whole, the bus system can take you back and forth 00:04:25
to school. 00:04:30
The school bus has properties that are different from the properties of its parts. 00:04:31
No part of the school bus has the ability to transport you. 00:04:35
The bus functioning as a whole system has these properties. 00:04:39
So, did you come up with some good examples of systems? 00:04:43
Now that you have an understanding of what a system is, how can you apply the concept 00:04:46
of systems to learn more about how the Earth works? 00:04:51
Recall the two features about systems. 00:04:54
Number one, each part of a system can itself be described as a system. 00:04:57
And number two, a system can be very different from its parts. 00:05:02
Okay guys, I have three questions I want you to try and answer before we continue with 00:05:07
the program. 00:05:11
What do you think are the parts of the Earth system? 00:05:12
How do the parts of the Earth system you identified work together to make Earth function as a 00:05:16
whole? 00:05:21
How is the Earth system itself part of larger systems? 00:05:22
Compare your answers to all three questions with others in your class or groups. 00:05:25
As the teacher pauses the program, keep in mind the two features about systems. 00:05:30
How did you do with those questions? 00:05:35
You know guys, NASA has come to understand that the only way to really comprehend the 00:05:38
workings of our planet is to view the Earth as a whole system. 00:05:43
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Idioma/s:
en
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:
279
Fecha:
28 de mayo de 2007 - 16:52
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
05′ 54″
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:
35.43 MBytes

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