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Hello, I'm Jared, back with another demonstration experiment on the
water cycle. We're gonna make it rain inside. That's a cool thing.
And it may seem like a lot of materials; it's very simple,
very user-friendly, very easy, and we can make it rain inside.
We want kids to be able to see the water cycle work.
So I have a pan full of water, I heated it on the burner.
I don't know if you can see the steam coming off? We wanted to speed up the
evaporation process
so instead of the sun heating the water from above, the coil
is heating the water from below making it evaporate. So
evaporation, easy. But the cool part about evaporation is it cleans and cleanses
the water. So I wanna make this water dirty.
I could spit in it, things like that. I'm just gonna put some
red food coloring, some blue food coloring.
You can put it in dirt you can put in vinegar. I'm gonna put some salt in,
you can put in sugar. You can see, plenty of salt.
And I have a soupy,
dirty mess in there. I would not wanna pick that thing up and chug it down,
it's dirty. But that's what's cool about the water cycle. We can take this mess
and purify it, clean it. We need all the water cycle to do it,
so here we go. All of that liquid in there is starting to evaporate. What I need
to do is,
I need to be able to condense that water vapor in this air.
How do I do it? Scientifically. I need something cold,
and I need the water to condense onto something. So I have this pan. How do I make
this pan cold?
Put some ice in it. So let's rip the bag open,
put some ice in. The ice is gonna melt,
form a nice cold layer of water. Now,
I'm gonna hold my "cloud"-
my layer of cold air- over this water vapor,
and you're gonna see this pan actually start to fog up.
What's going on? Well as that water vapor is hitting that cold pan it
wants to condense back into liquid and it's starting to condense into a liquid.
And as it-
as more water vapor hits, all of those tiny droplets of water
get bigger and bigger as more water condenses onto it. You can actually see
it. And
we're gonna give it some time, but actually enough water's gonna condense
on the bottom of this pan, it's gonna rain.
It's going to precipitate. And the cool thing is,
I'm gonna lick this pan. It's not gonna taste like salt, why?
All the dirt's left down in the pan.
That's a cool thing about the water cycle, it cleans all the water. It's an amazing
design.
So to show you
the water on this pan we brought in a little light and we're gonna angle the dish.
I normally wouldn't do this, but just so you can see the water condensing onto the
the pan, and you see it precipitate. So here we go. Let's angle this,
try to keep the ice in the pan. And if you'll see the water dripping down, it's
not dripping, it's raining folks. That's the scientific term.
We have water evaporating, hitting the cold air or the cold pan, condensing
onto that.
That water droplet gets so heavy that it rains, it
precipitates. It's the beauty of the water cycle. Thanks for watching.