Hey there, scientists! It's Justin again.
Have you ever seen a magician pull a rabbit out of a hat? Well, today I'm going to
do something even more spectacular. I am going to pull something out of this
hat without even touching it! I know, and the best part is it's not even
magic; it's science. Watch this! Ta-da! Pretty impressive, huh? I used
this magnet to pull this paper clip out of the hat without touching it. I know
it's not really magic, but I can't quite explain how the magnet was a
ble to do that.
You know, why do things stick to magnets? [Intro music] We know that objects can't move unless a force
is acting on them. This ball won't move unless I throw it; my jacket zipper won't zip unless I pull
it. So, if the magnet wasn't touching the paper clip, how did it make the paper clip move? Well,
magnets have the very special ability to apply force without touching an object. It seems like
magic, but remember, it's just science! Magnets have their own force called magnetis
m that pushes
and pulls certain objects. Let me show you. Here, I have the same paper clip and magnet from my
magic trick. When I bring the magnet closer, the magnet pulls the paper clip toward it. How
cool is that? It's using magnetism to pull the paper clip closer. Oh, I have an idea. Let's see
what happens when we put two magnets together. Magnets have two different sides called poles.
They have a north pole and a south pole. If you look at the ends of a magnet, you'll see a
red side wi
th an N and a blue side with an S. The N stands for north, and the S stands
for south. That's how you can tell which pole is which. When I bring the north pole to
the south pole, they attract each other, or pull, just like the paper clip. But
when I bring the matching poles together, they repel each other, or push each other
away. Wow, magnetism is amazing! Did you know that only some things are magnetic? That
means attracted to magnets. Why don't we, ah... perfect! My backpack's right here
. Let
me, uh, grab some items so we can test. OK, I found a safety pin, a pencil, and scissors.
Let's test these objects and see if they're magnetic or not. Make sure you have your magnetism
investigation sheet and a pencil ready to go! The first object we're going to test is this
safety pin. Before we test it, we need to make a prediction on our magnetism investigation sheet.
Color in the thumbs up if you think it will be attracted to the magnet or color in the thumbs
down if you do not t
hink it will be attracted to the magnet. Alright, here we go. Look at that! The safety pin is magnetic. The magnet pulled it up using its force of magnetism. Color in the thumbs
up in the next column to show that the safety pin was magnetic. Let's make a prediction about our
next object, a pencil. Thumbs up if you think the pencil is magnetic and thumbs down if you think
it is not magnetic. Here we go. Looks like this pencil is not magnetic. The magnet's magnetism
did not attract this pencil
. And finally, we have scissors. Make your prediction. Will
the scissors be magnetic or not? Let's find out! Wow, the scissors are magnetic, but
are you noticing what I'm noticing? Only the metal part of the scissors
is sticking to the magnet. I wonder if the plastic part of these scissors
is magnetic, too. Let's, uh, find out! Yeah, the plastic is not magnetic, but the metal
part is. Remember, magnets have a force called magnetism that attracts only certain objects.
As we learned with my
scissors and pencil, magnets do not attract wood or plastic, but
they do attract metal, like my safety pin and the metal on my scissors. But not all metals are
magnetic. The metals that are magnetic are iron, nickel, cobalt, and steel. It's hard to tell if
a metal object is magnetic just by looking at it because different metals can look very
similar. If you have a magnet at home, pause the video here and find three
more objects to test on your magnetism investigation sheet. I challenge you
to find a
metal object in your home that is not magnetic! So, how did magnetism help me perform my
magic trick? Well, magnets have a force called magnetism. We know that certain metal objects made
of iron, nickel, cobalt, or steel are magnetic, which means they are attracted to magnets. That
means the paper clip must be made out of one of those metals. Magnetism pulls, or attracts,
magnetic objects toward it and pushes, or repels, like poles away from it. Magnets can
push and pull magneti
c materials without even touching them. Continue investigating magnets
to discover as many magnetic objects around your home as you can. Maybe you can even turn
your investigation into a magic show. Thanks for joining me today! Remember, science is
all around us, and I'll see you next time. [Outro music]
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