Hi I am Jared welcome to Fun Science Demos.
Check this out.
How did I do that? What was going on there? Was it magic?
No it was science.  What you did not see me
do is rub this straw on this fur and charge it up?
Well what do I mean when I say charge it up.
Well through science we discovered
that all matter is made of positive and
negative charges and sometimes some of
that matter we can actually rub off
only the negative charges and that
allows us to do some really interesting things.
Remember by me rubbing this
strong this fur I am putting more
negative charges on the straw and
through science we have discovered that
positive and negative charges attract.
They come together. Think of it like this
When the charges are different they want
to come together but when the charges
are the same they want to push apart and
scientists call that static electricity.
So now let us take a look at this so I
have a can and remember we said that all
matter is made of positive negative
charges this can is not charged so it is
made of positive and negative charges.
Now watch what I do here I am going to
rub this balloon on the same fur that I
rub the strong and it is going to pick up
a whole lot of extra negative charges.
What do you thinks gonna happen when I
take this balloon and put it toward the
can will you can push away or will the
can roll toward the balloon.
Let us take a look and find out here we
go negative charges on the balloon the
can is made a positive and negative charges.
What just happened there?
The positive charges on this can were
attracted to the lots of negative charges on this balloon. Let us see if we
can do that again and see how fast we
can get this can go and maybe...
maybe race it off the table
Can races with static electricity.
So remember we said all matter is made of positive and
negative charges and that also holds
true for liquid matter here. I have a
container of water and have a cup with a
hole punched in the bottom I'm going to fill
this cup with water
hold it up and let the water drip out
the bottom of the cup and then hold my
balloon up to that stream of water.
Let us see what happens is the water
going to be pushed away from the balloon
or is it going to be pulled toward the balloon
so I am going to rub the balloon
and charge it up with lots of negative charges.
Hold up my cup and you can see the water
is pulled toward the balloon so what does that mean.
Well I had a lot of extra negative
charges on here What kind of charges attract.
Opposite charges attract so that means this water must
have lots of positive charges so what
does that mean. That means I rub the
balloon on the furniture charged with
lots of extra negative charges if that
water is pulled toward the balloon that
water must have positive charges in it.
So we know that balloons can pick up
extra negative charges but I have to
wonder can other things pick up extra
negative charges so to test this out we
have lines of just torn up little paper
called confetti I have a comb a plastic
fork and a plastic bat instead of using
fur we are going to try using wool just
wool fabric so let us check it out.
Let us start with the comb pick the comb up.
I am going to rub the comb on the wool
charging it up with extra negative charges.
What do you thinks gonna happen when I
pass it over the torn up pieces of paper
it is kind of jumping onto the comb but
is it really jumping no positive and
negative charges attract. It worked!
Let us try the fork charge it up with
lots of extra negative charges pass the
work over and you can see a few bits of
paper are attracted to the negative
charges now let us try the plastic bat.
We charge it up and you can actually hear
and see the paper stand on end as I wave
it over and it jumps right onto the back
it did not jump the positive and negative
charges are attracted to each other so
finally take a look at this game that we
made up using static electricity we call
it sharks and minnows. I have some sharks
made of tissue paper hanging from this
crate you could hang them from your desk
and let them drape down toward the floor and then I
have a little dish of what I call fish
food it is just the confetti we used in
the other demonstration and then I took
the straw we used from the very
beginning I cut out a little styrofoam
fish take two straws together.
Here is the minnow. Here are the sharks
and the this is how it works.
The fish food goes in here. The idea is
you have to charge up the minnow straw
getting lots of extra negative charges
on this and I have to try to get some of
the food to be attracted to the minnow
without getting eaten by the sharks as
soon as the Sharks touch the minnow
I am out so let us see if we can do this
and reach in.
He got me try over here! He got me!
Reaching this way...
Static electricity could actually be a
fun game sharks and minnows Sharks and
minnows was a game we created using
static electricity. Can you create your
own game using static electricity?
What if instead of tissue paper sharks
what if I hung up soda cans.
I do not know give it a try.
Science is so cool If you want to learn more about
static electricity check out our links
in the video description.
Thanks for watching :)
