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Science 5: Photosynthesis and Humans 26 Views
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Description:
Are you ready? We're finally going to reveal how humans can harness the power of photosynthesis for themselves. Groundbreaking stuff. Check it out in this video.
Transcript
- 00:03
[Dino and Coop singing]
- 00:13
Have you ever been in your kitchen preparing a delicious afternoon snack... [Girl getting nachos out the microwave]
- 00:17
Only to have your siblings appear out of nowhere, like vultures awaiting their next meal. [Girl looking angry]
- 00:21
Ugh…they're called nachos for a reason.
- 00:24
Because they're nacho snack!
Full Transcript
- 00:26
Anyway.
- 00:27
This is most certainly an example of others benefiting from your hard work. [Her little sister cries]
- 00:30
But you shouldn't be too mad at your siblings.
- 00:33
Because after all, you benefit from the hard work of others all the time.
- 00:36
And no, we're not talking about your mom and all of her cooking. [Girl eating her dinner]
- 00:38
Though…that's true too.
- 00:40
When this video is over, you should probably go thank her. [Mom smiles]
- 00:42
No, what we're actually talking about is how you benefit from the hard work of plants.
- 00:45
Yep.
- 00:46
Plants.
- 00:48
But when plants work hard to make their own food through the process of photosynthesis, [Light shining onto a tree]
- 00:52
we humans benefit as well.
- 00:54
The most obvious way we benefit from this process is that photosynthesis makes oxygen
- 00:59
that we then breathe.
- 01:01
And yeah, breathing is pretty important, but that's not what we're talking about today. [Girl deep breathing, then looks surprised]
- 01:04
So how else might we benefit?
- 01:06
Well, let's take a look at this plant.
- 01:08
Pretty cute, huh?
- 01:09
But not super useful to us, is it? [Tiny plant in the ground]
- 01:12
Well, hold onto your hats!
- 01:14
…and if you're not wearing a hat, go put on a hat!
- 01:16
Hats are cool!
- 01:18
Because here comes the sun, doo doo doo doo, kicking off the super-sweet [The sun in the sky]
- 01:22
process of photosynthesis.
- 01:24
And six weeks later...
- 01:25
Well look what we have here.
- 01:27
Not so tiny anymore, huh?
- 01:29
In fact, that plant is looking practically all grown up. [Mustache appears on the plant]
- 01:32
But is it useful to us yet?
- 01:34
Ehhh…not so much.
- 01:35
Let's check back in another six weeks.
- 01:37
And through a little movie magic… [Clock ticking]
- 01:40
Would you look at that?
- 01:40
It's been three months!
- 01:42
Time for the big reveal.
- 01:43
Ta-da!
- 01:44
Now that's what we like to see. [Scary looking pumpkin]
- 01:47
The photosynthesis process produces food for the plant, which in turn allows the plant [Coop pointing at a blackboard]
- 01:51
to grow.
- 01:52
And when plants grow big, they often produce things that we humans can benefit from.
- 01:56
Do you like fruit and veggies? [Picture of fruit and veg]
- 01:58
Well, then go high five a plant and say thanks! [Kid squishes a tomato]
- 02:00
Or…actually, don't.
- 02:02
They're pretty fragile.
- 02:03
Send them a card, or something.
- 02:04
And plants aren't just useful for the occasional juicy snack either.
- 02:07
Large portions of the human population depend on important crops to live, like rice and corn. [People farming]
- 02:13
And that's why it's important to make sure that our little plant buddies are growing
- 02:16
up to their fullest potential.
- 02:18
Plenty of people even study things like agricultural science to make sure that happens. [People in an agricultural science lab]
- 02:22
They examine how things like temperature, water, and amount of sunlight can affect all
- 02:26
rates of photosynthesis, and in turn, the amount of crops grown. [Guy up to his eyes in water]
- 02:30
The growth of food is something we often take for granted – especially when we live in
- 02:34
cities far away from any farmland.
- 02:36
But if it weren't for the magic of photosynthesis, well, our diets would probably look a whole [Kid looks grossed out by a broccoli bar]
- 02:41
lot less colorful.
- 02:42
Now get to work writing that thank you card! [Thank you card appears]
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