Koko:
Owlo! Owlo! You have to see what happened at the market this morning!
Owlo:
Koko, you look like you ran all the way here. What happened at the market?
Koko:
I was helping carry the groceries, and my bracelet flew off my wrist and stuck to a big metal pole. It just flew, Owlo. By itself!
Owlo:
Oh my, that must have been quite a surprise. Did anyone explain what happened?
Koko:
The market man said something about magnets, but I didn't really understand. Is my bracelet magic?
Owlo:
Not magic, Koko, but something just as wonderful. What you experienced is called magnetism.
Koko:
Mag-ne-tism. That's a big word. What does it mean?
Owlo:
Magnetism is an invisible force. It can pull certain things toward each other, or push them apart, without even touching them.
Koko:
So it's like a superpower that you can't see?
Owlo:
That is actually a perfect way to think about it. I have some magnets in the science lab. Shall we go take a look?
Owlo:
Here we are. Now, pick up that red and blue bar on the table. That is called a magnet.
Koko:
It feels like a normal stick. It doesn't look special at all.
Owlo:
Try bringing it close to these small metal paper clips and see what happens.
Koko:
Whoa! They jumped right onto it! I didn't even touch them! That is so cool!
Owlo:
That pulling force you just felt is magnetism at work. The magnet creates something called a magnetic field around it.
Koko:
A magnetic field? Is that like an invisible bubble around the magnet?
Owlo:
Exactly right. That invisible bubble is where the magnet's force can reach out and grab things.
Koko:
But why did it grab the paper clips and not my pencil?
Owlo:
Great observation, Koko. Magnets only attract, which means pull, certain metals. Iron and steel are the most common ones.
Koko:
So my bracelet must be made of iron or steel then. That's why it flew to the pole!
Owlo:
You figured it out yourself. Now, look at your magnet. Do you see the letters N and S on each end?
Koko:
Yes! One end says N and the other says S. What do those mean?
Owlo:
N stands for North and S stands for South. Every magnet has two ends, and we call them poles.
Koko:
Like the North Pole where it's super cold and snowy?
Owlo:
That connection is very clever, Koko. Earth is actually a giant magnet, and it has a North Pole and a South Pole too.
Koko:
Wait, the whole Earth is a magnet? That is the most amazing thing I have ever heard!
Owlo:
It truly is. Now try pushing the two magnets together with the same letter facing each other and tell me what you feel.
Koko:
They won't touch! It feels like something is pushing them away. It's like they're arguing with each other!
Owlo:
When two of the same poles face each other, they repel, which means push away. But try the opposite ends together.
Koko:
Oh, they snapped together really fast! So same poles push away, and different poles pull together?
Owlo:
Perfect. Opposite poles attract, and same poles repel. That is one of the most important rules of magnetism.
Koko:
This is so much better than magic. Magic you can't understand, but magnetism has rules you can learn!
Owlo:
I love that thought, Koko. Now, before we head back, can you tell me what you learned today?
Koko:
Okay! So, magnetism is an invisible force that can pull or push things without touching them. Magnets only attract certain metals like iron and steel. Every magnet has a North pole and a South pole. Opposite poles attract each other, and same poles repel. Oh, and the whole Earth is one giant magnet, which honestly still blows my mind a little.
Owlo:
That was a wonderful summary, Koko. You should be very proud of yourself today.
Koko:
Next time I want to find out how magnets are used in real things, like maybe trains or phones. There's so much more to explore!