Hey, everybody.
What's up.
It's Janaye and I'm hanging out
with my friend, Dylan.
Hi.
And we're in Ottawa, Ontario,
at the Canada Science
 and Technology Museum.
Cause Today's Thing is...
Both: ..science!
Hey, guys. We're here with Kat
and Kat is going to be
showing us some
super cool science today.
So, Kat,
what did you have in mind?
We have liquid nitrogen.
Liquid nitrogen?
Yeah. It freezes things.
It freezes things?
Is that true?
It does. It's a liquid that's
at minus 196 degrees celsius.
Whoa!
I'm going to put
my goggles on
and we have air
that's trapped. in our balloon.
Uh-huh.
So if we put
it in here...
Janaye:
 Keep on going down.
It took all the air out.
[Janaye gasps]
♪ [upbeat]
It took all the air out!
That's crazy.
Just leave it a little
second and take it out.
Janaye: Whoa!
So, the air that's inside,
it's still inside,
it's just taking
a lot less space.
and that is why.
So, before-- [indiscernible]
I put an extra one.
Dylan:
 It's leaping off of it!
[Janaye giggles]
As it arms up again--
It's going to expand?
All the air inside
is going to expand
and take all the space
and then push on the sides
of the balloon.
OK, Kat,
What are we doing next?
We're going to do
a superconductor experiment
Right. Here I have a ring
Of rare earth magnets.
A really, really,
really strong magnets,
not like the French ones.
And here I have a puck
and this puck
Has a superconductor inside,
but when I put
it in liquid nitrogen,
you're gonna
see something really cool.
That's definitely floating.
It is definitely floating.
It is floating.
So, it is floating on top
of the magnetic field.
♪ ♪
[swoosh]
Cool Science!
Both:
Cause that's Today's Thing.
Whoa! So cool.
