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Science 4: Water Cycle
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Apologies in advance if you came here really excited about a bicycle you can ride on water. We get that a lot. This video is really about the cycle...

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Science 4: Types of Maps
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Science 4: Water Cycle 444 Views


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Description:

Apologies in advance if you came here really excited about a bicycle you can ride on water. We get that a lot. This video is really about the cycle of states that water goes through. Which is still pretty cool too. Check it out.

Language:
English Language

Transcript

00:04

[Coop and Dino singing]

00:13

When you're little, anything that's older than you can seem completely ancient. [Boy walking down the stairs]

00:17

That weird boxy TV in your basement?

00:19

Old.

00:20

Photos of your dad from when he was in high school?

00:22

Super duper old. [Photo of boy's Dad stamped]

00:24

That jar of licorice that has been on your Grandma's coffee table since you can remember?

00:27

Probably about as old as the dinosaurs. [Dinosaurs in a field]

00:30

But if you really want to see something truly old, all you have to do is turn on the tap

00:33

in your house.

00:34

Water?

00:35

Now that's old. [Water coming out of a tap]

00:37

How old?

00:38

Well, seeing as all of the water on Earth is the same water that's been on Earth since

00:41

the beginning of time, we'd say it's pretty old.

00:45

Which…seems kind of confusing, right? [Man sitting drinking an espresso]

00:47

After all, water seems to be changing all the time – we drink it, it evaporates, it

00:51

rains, it freezes, we turn it into snowballs and slushies and apple juice... how can the

00:55

water we have today be the same water from billions of years ago? [Water pours into a magicians hat]

00:59

Magic, That's how.

01:00

…Just kidding!

01:01

It's science.

01:02

See, here's the thing: water is constantly changing forms, from a liquid to gas to solid

01:07

and back again.

01:08

But even in all those different forms, it never stops being water. [Coop discussing the different water forms]

01:12

After all, you could put on a clown costume, a cowboy costume, and a gorilla suit, and

01:16

you'd still be you.

01:17

All of this changing is referred to as the water cycle, and it has many different parts: [Dino teaching about the water cycle]

01:22

evaporation, condensation, precipitation, transpiration, run-off, and infiltration.

01:27

Huh, those last two make water sound like some sort of secret agent… [Man struggling to carry a large water bottle]

01:30

But that'd be ridiculous.

01:32

Even if water could infiltrate enemy territory, it wouldn't be able to tell us their secrets

01:36

afterwards.

01:37

…or could it…hm.

01:39

Someone should get the FBI on this… [Men standing in a room having a cup of water]

01:40

Anyway, while we call up the FBI, let's check out each step of the water cycle!

01:44

First up is evaporation, which occurs when water changes from a liquid to a gas. [Coop discussing evaporation]

01:49

Picture a puddle on the ground.

01:50

And then picture the hot sun above.

01:52

The solar energy from the sun causes the exposed water molecules from the puddle to turn into [Water turns into vapor]

01:57

water vapor, which rises up and forms clouds.

02:00

Nope, it's not something out of Harry Potter…it's an example of evaporation.

02:03

Next up is condensation, which is pretty much the exact opposite of evaporation.

02:08

That's because condensation is when water changes from a gas to a liquid. [Dino discussing condensation]

02:12

When the evaporated water molecules in clouds are cooled down enough to turn back into liquid

02:16

water droplets, then that's condensation. [Dark clouds and rain begins to fall]

02:19

And when that rain actually falls down from the clouds into the sky and back down to the

02:23

earth – whether it's as rain, snow, hail, or anything else - we call that precipitation.

02:27

Oops…sorry.

02:28

Should've told you to bring an umbrella to this video… [Man standing in a field and soaked by rain]

02:30

But here's one you probably haven't heard of before... transpiration.

02:34

Transpiration occurs when water is evaporated from plants.

02:38

In other words, when water goes into the plants roots, it slowly travels up through the plant, [Water travelling up through a plant]

02:43

hydrating everything as it goes.

02:44

Eventually, this water reaches small pores on the underside of the plants leaves, where

02:48

it turns into vapor and is released out into the air to be evaporated.

02:52

And that's transpiration!

02:54

We bet your folks don't even know about that one.

02:56

But before water can even get into the plants roots, it has to soak into the ground first. [Water soaking into the ground]

03:00

And thankfully, there's a word for that: it's called infiltration.

03:04

Which explains why the FBI hung up on us when we called…

03:07

And if rain water falls to the ground and doesn't go into the ground, but instead runs

03:11

off elsewhere?

03:12

We've got a word for that too: run-off. [Coop discussing run-off]

03:14

Super clever name, right?

03:16

If precipitation hits the ground and “runs off” into a lake, a river or even a stinky

03:20

sewer, then you've got yourself some run-off.

03:23

All of these different processes are constantly happening, and they all make up the water cycle.

03:27

And it's because of them that we can say that the water here on Earth is some of the oldest [Water vapor]

03:31

stuff around.

03:32

Yup, even older than those funky old bell-bottoms your dad still keeps around for some reason. [Dad dancing in the living room]

03:37

Hm…maybe we can call the FBI and see if they could make those disappear…

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