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Sand Research - Contenido educativo
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NASA Kids Science News segment explaining why astronauts study sand in space.
Hi, I'm Grant with another NASA fact.
00:00:00
Did you know astronauts study sand in space?
00:00:07
Why would astronauts study sand?
00:00:10
On Earth, dry sand or soil particles are tightly packed together.
00:00:12
This creates friction that makes the sand or soil strong.
00:00:16
What about wet sand or soil?
00:00:19
If water gets between the particles, then the particles lose friction and the ground
00:00:21
can act like quicksand.
00:00:25
This is called liquefaction, which means solid sand or soil acts more like a liquid.
00:00:26
How can studying sand in space help scientists on Earth?
00:00:32
On Earth, gravity pulls the particles down too fast to watch.
00:00:36
In space, scientists can watch and study the particles slowly separating.
00:00:39
This helps our scientists understand how soil moves during an earthquake.
00:00:44
Who else can ask to help with their results?
00:00:48
For the answer to this question and more, check out our website.
00:00:51
Until next time, I'm Grant with another cool NASA fact.
00:00:54
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- 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:
- 517
- Fecha:
- 28 de mayo de 2007 - 14:14
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 00′ 58″
- 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:
- 6.07 MBytes