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How Far Smells Travel

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Why? Files segment describing how NASA scientists track smells around the globe.

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Hi, I'm Bianca, and this is Jacob and Matthew. 00:00:00
Hi guys, I'm Jack Fishman, and I work at NASA Langley Research Center in the Atmospheric Sciences Department. 00:00:03
Is there anything I can help you with? 00:00:09
We have one question. 00:00:10
We were wondering if smell could travel all the way from Exville to Big City. 00:00:12
Well, you know, that's a research area I've been doing for a long time, 00:00:16
and I might just be able to have some answers for you. 00:00:19
Come on over to the laboratory and let me show you some stuff. 00:00:21
Okay, cool. 00:00:23
How far do smelly things travel? 00:00:26
Well, you would really be surprised. 00:00:28
Here at NASA Langley, in our Atmospheric Sciences Research Program, 00:00:30
we have special instruments we put on both airplanes and even on satellites to track these smelly molecules. 00:00:33
How far do you think they can travel? 00:00:39
Hundreds of miles? 00:00:40
From here to Tennessee? 00:00:41
From here to California? 00:00:42
Well, you'd be surprised. 00:00:44
At one point, we actually took measurements of fires in Africa and South America, 00:00:45
and we were able to track the chemicals in the smoke hundreds and hundreds of miles off the coast. 00:00:50
Even when you were so far away from the fires, could you still smell them? 00:00:55
The smoke was certainly less dense and not even visible, 00:00:58
but with our special instruments, we could still tell that smoke was in the air and that smelly molecules were present. 00:01:01
And let me tell you something else. 00:01:07
We fly instruments on satellites that are able to see the smoke and these smelly molecules travel 00:01:09
all the way from South America all the way around the world past the Pacific Ocean. 00:01:13
Will they ever disappear? 00:01:17
Well, actually, yes. 00:01:19
Eventually, they'll react with another molecule to make a less smelly molecule. 00:01:20
These molecules, in turn, may get washed out by the rainfall. 00:01:24
And yes, they disappear. 00:01:27
Wow. I guess the answer is yes. 00:01:29
Smell really can travel. 00:01:31
I guess we'd better go back to see if we're right. 00:01:33
Hey, there's Dr. V. Let's go. 00:01:35
Thanks for all your help. Bye. 00:01:37
Bye, guys. 00:01:39
Bye. 00:01:40
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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:
262
Fecha:
28 de mayo de 2007 - 15:33
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
01′ 41″
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:
10.24 MBytes

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