Saltar navegación

Activa JavaScript para disfrutar de los vídeos de la Mediateca.

Food Web

Ajuste de pantalla

El ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:

Subido el 28 de mayo de 2007 por EducaMadrid

315 visualizaciones

NASA Why? Files segment explaining the concept of the food web as well as the terms producers, consumers, and decomposers.

Más información Transcripción

Descargar la transcripción

Hello Ranger Cortez. Hi Kaylee. Dr. D said you might be coming over for a visit today. 00:00:00
What can I help you out with? I'm concerned about the fish in the bay. No one has caught 00:00:18
any for a long time. I'm trying to figure out what's happened to them. Well what do 00:00:23
you think happened to them? I think it might be because they don't have enough food to 00:00:27
eat. That's possible. Have you checked to see if anything happened to disrupt the food 00:00:32
web? What's a food web? Organisms that live together in an area are called a community. 00:00:35
Members of the community depend on each other for survival. This dependence is called the 00:00:41
food web. How do they depend on each other? In a typical community you'll find producers, 00:00:45
consumers, and decomposers. Plants and algae are producers. They take the energy from life 00:00:51
and use that to convert carbon dioxide, water, and minerals into food. This process is called 00:00:57
photosynthesis. What are consumers? Organisms that eat other organisms are called consumers. 00:01:04
There are three different kinds of consumers. Do you know what they are? I think that one is 00:01:09
a herbivore. They eat plants. And one is a carnivore. They eat other animals. That's right. 00:01:14
And an omnivore is a consumer that eats both plants and animals. I guess that makes me an 00:01:19
omnivore. You can see how they all depend on each other. If plants didn't exist, the herbivores 00:01:24
would have nothing to eat and they would not survive. And if the herbivores didn't survive, 00:01:29
then the carnivores wouldn't have anything to eat. That's right. You catch on quick. 00:01:33
What are decomposers? In order for a community to be successful, there must be a way to return 00:01:37
the minerals and other basic ingredients back to the producers. Decomposers do this. How do 00:01:43
they do that? Decomposers, bacteria and fungi, feed on dead producers and consumers and convert 00:01:48
them back to the basic materials needed by producers to grow and reproduce. It's a cycle. 00:01:55
That's correct. Now what you might want to do is take a look at the ocean and see if there's 00:02:00
anything that happened to disrupt the cycle of the food web. That's a great idea. Thanks. Oh, 00:02:06
by the way, would you mind taking a couple of plants to Dr. D for me? The first terrarium. 00:02:11
Sure, no problem. Great. 00:02:16
Valoración:
  • 1
  • 2
  • 3
  • 4
  • 5
Eres el primero. Inicia sesión para valorar el vídeo.
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:
315
Fecha:
28 de mayo de 2007 - 15:33
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
02′ 21″
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:
14.30 MBytes

Del mismo autor…

Ver más del mismo autor

EducaMadrid, Plataforma Educativa de la Comunidad de Madrid

Plataforma Educativa EducaMadrid