For today's at-home experiment,
we are going to make
our very own lava lamp
using the power of density.
Now, remember, all kid scientists
need a grown-up's approval.
So, for this one, you need
a little bit of water, a glass, like this,
some vegetable oil,
salt,
and to go with the theme of the day,
we have some phosphorescent powder
and a UV light,
because we wanna make our lava lamp glow.
So, the first thing you wanna do
is fill your glass most of the way
with water.
And then, you wanna add 
your vegetable oil.
So, if we watch what happens here, 
watch closely,
because the vegetable oil
is rising to the top.
That's because vegetable oil 
is less dense than water.
It's lighter than water, 
so it rises to the top.
Now, to start our lava lamp effect,
we have some salt here.
Salt is heavier than water,
so it's gonna wanna fall to the bottom.
So when I add it here,
you can see what happens.
It's grabbing onto the molecules 
in the oil,
and taking down some of that oil with it.
But once it gets down to the bottom,
the salt dissolves in water,
and you can see
the oil starts rising to the top again.
And we're seeing that same effect 
that we had before.
But we want to make it glow, right?
So let's add some phosphorescent powder.
And we're gonna make this glow
really bright orange.
Mix, mix, mix, mix.
Okay, so, now, all we need is our UV light
so we can see this glow in action.
Whoa!
Look at that, that worked so well!
And the fun part about this
is that you can do this again and again.
And look at that, look how cool that is.
That is how you make your very own
glowing lava lamp.
