[♪ INTRO] Mmm mmm! Dinner was great! [Squeaks squeaks] Thanks for cooking with me, Squeaks. [Squeaks squeaks] And you know what I love the
most after a good dinner? Something sweet! [Squeaks squeaks] How about some gelatin snacks? [Squeaks squeaks] Yum! [Squeaks squeaks] Whoa, no way! Gelatin is one of your favorite desserts? Mine, too! What do you like about it? [Squeaks squeaks] You’re right! It is really wobbly. And so squishy! I wonder if we could squish it through
something… like a coland
er maybe? [Squeaks squeaks] Awesome! Let’s do a little
experiment before dessert! Okay! So, I’ve got our gelatin,
a spoon, and a colander. Normally, I use a colander to drain
the water when I’m cooking pasta: It has a bunch of holes in it
so all the water can get out. But let’s see if gelatin can
squish through these holes! [Squeaks squeaks] Whoa, that’s pretty fun, isn’t it? [Squeaks squeaks] Squeaks wants to know if gelatin is a solid
or a liquid… which is a good question! It slices like
a solid. And when
you squish it, it bounces back. But it’s also pretty easy to push
through the holes in this colander, which is a little more like a liquid than a solid. And gelatin is pretty wet! What if we tried this with
other liquids or solids? We already know liquid water goes
through the holes when we use the colander to make pasta. And the pasta, which is more
solid, gets stuck behind. It seems like the gelatin
is somewhere in the middle. [Squeaks squeaks] Oh, I love that idea! Sq
ueaks asked if we could
try making gelatin together! That might help us learn why it
looks and moves the way it does! Let’s do it! Okay! Here’s everything we need! Let’s start by looking at
some of our gelatin powder! If we look closely, we can see
it’s made of these solid grains. We’re going to mix this powder
with some boiling hot water, and stir until it’s mixed together. It’s important to be careful with
boiling water so you don’t burn yourself, so I’ll go ahead and do this part. Now i
t says to stir for a couple of minutes. Squeaks, what do you think will
happen when we mix this up? [Squeaks squeaks] You think the powder will disappear? [Squeaks squeaks] Oh, like the one time you and Jessi
mixed sugar and water together to make rock candy! Let’s see! Whoa! The powder looks like it’s
disappearing, and the water is turning red! Good thinking, Squeaks! The powder is dissolving. It’s coming apart to mix with the water. And hot water is especially
good at making things dissolv
e! We’re using heat to help us make this change. Eventually, the powder is so
broken up we can’t see it anymore! We don’t have powder and water anymore. We have a new mixture. Which we can see with our eyes, because
the color of the water changed, didn’t it? It was clear, and now it’s red! [Squeaks squeaks] It looks like all of our powder is dissolved! Now, we need to carefully pour this mixture
into the pan and let it cool in the fridge for about four hours. [Squeaks squeaks] Don’t worry, Sq
ueaks, I had some
gelatin cooling in the fridge already! [Squeaks squeaks] But before we take a look, Squeaks: Do you think this will be wiggly, squishy gelatin, or just the same red water we put in the fridge? [Squeaks squeaks] Gelatin? Okay, let’s see! [Squeaks squeaks] Wow, look at that! It’s so wiggly and squishy! It’s gelatin, just like from our dessert earlier! We started with a solid: our powder! Then, we dissolved that powder
into water, which is a liquid. And once we cooled our mixtur
e in the fridge, we ended up with this wobbly, squishy stuff! Hey Squeaks! Can you name
some other solids and liquids? [Squeaks squeaks] Water is a liquid. But we can see it become a solid
if we put it into the freezer. It freezes into solid ice. So what about our gelatin?
Is it a solid or a liquid? Well, it turns out, gelatin is a little of both! If we could look very closely
at our gelatin powder, we’d see that the gelatin is a solid. And it looks like a teeny spider
web that’s all stretc
hed out. But instead of trapping insects, that web
traps a bunch of tiny pieces of water. So, you can think of our gelatin dessert
as being between a solid and a liquid. It’s called a colloid. That’s why it’s bouncy like some solids, but really wet and easy to
squish through a colander! And we can’t get either of our
ingredients back, can we, Squeaks? [Squeaks squeaks] We can’t separate the water from the powder. They’ve made a new combination.
They’ve become gelatin! Can you think of anyth
ing else that
acts like both a solid and a liquid? Have you ever played with oobleck? What about slime? I hope you had fun learning with us today! If you want to see more fun episodes
with me, Squeaks, and all our friends, go ahead and hit the subscribe
button – and we’ll see you next time, here at the Fort. [Squeaks squeaks] [♪ OUTRO]
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