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Science 5: Food Webs 16785 Views
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Description:
If Spiderman could spin these he'd never be hungry again. Today we're learning all about food webs. Which you actually can't eat, by the way...sorry to get your hopes up.
Transcript
- 00:05
[Dino and Coop singing]
- 00:13
There are two words that you'll hear in your life that are more important and meaningful [Boy with his hands in the air]
- 00:17
than all the other words combined.
- 00:19
“Taco night.”
- 00:20
Those two words truly are magical, aren't they? [Long line of tacos appear]
Full Transcript
- 00:23
Unfortunately, every night is not taco night.
- 00:26
It might be “casserole night” or the dreaded “grandma's weird stew night." [Dino sat next to a bowl of stew with eyeballs in it]
- 00:29
The point we're trying to make here is that your diet is probably pretty diverse.
- 00:33
But, even so, if we were to put all that food into a food web…well, it wouldn't really [Different foods on a spider web]
- 00:37
look all too interesting.
- 00:39
It'd be you on top and all that food below. [Man meditating on a pile of food]
- 00:42
Thankfully, not all food webs are super boring.
- 00:45
But…wait.
- 00:46
Rewind.
- 00:47
What exactly is a food web?
- 00:48
Well, it's simple, really.
- 00:50
A food web is an image we can use to show different food chains, or in other words, [Coop pointing at a blackboard]
- 00:54
who eats what.
- 00:55
A typical food web might look a little something like this: [Spider crawling in its web]
- 00:58
First, we see some plants.
- 01:00
Plants are called “primary producers” because they make their own food using chemistry.
- 01:04
And no, not the kind you learn about in high school. [Plant next to a bunsen burner in a lab]
- 01:06
Unless you happen to sit next to a orchid in your chemistry class…then we stand corrected. [A flash explodes]
- 01:10
And to give credit where credit is due, they don't do it all on their own; they use energy
- 01:15
from the sun to help them out.
- 01:17
Next up come the animals that eat the plants. [Animal on top of the plants]
- 01:19
They're called “primary consumers” because they eat the “primary producers.”
- 01:23
Nice and simple so far, right?
- 01:25
Plants using the sun to make food for themselves, and then animals eating the plants for food. [Guinea pig in a cage]
- 01:30
Unfortunately, life isn't so simple.
- 01:32
Enter our secondary consumers.
- 01:34
These are animals that eat, you guessed it, our primary consumers. [Secondary consumers on top of the primary consumers]
- 01:39
And above them come the tertiary consumers.
- 01:41
All animals that eat other organisms are often referred to as simply “consumers.” [Dino eating a marshmallow]
- 01:46
Connect all those animals together based on who eats what, and we've got ourselves a food web!
- 01:51
And a very scary life for whoever is near the bottom of that pyramid. [Raccoon in a wood]
- 01:54
Maybe don't go outside too much, okay? [Raccoon runs away as the shadow of a bird flies overhead]
- 01:56
Food webs are useful tools to see how ecosystems are connected, as well as to remind us all that
- 02:01
living organisms get their energy from the food they eat or make – no matter how [Coop pointing at a blackboard]
- 02:05
they go about getting it. [Spider making a web]
- 02:06
Another great thing about food webs is that any time there's a human involved, we always
- 02:10
get to be on the very top of it.
- 02:12
For now, anyway.... [Shark jumps over the food pile and eats the guy on top]
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