Why do two magnets sometimes pull together and sometimes push apart?

It depends on which poles face each other. Opposite poles (North facing South) attract and pull together, while the same poles (North facing North, or South facing South) repel and push apart.

Can a magnet have only a North pole or only a South pole?

No. Every magnet always has both a North pole and a South pole as a pair. If you cut a magnet in half, each piece becomes a smaller magnet with its own North and South pole.

How can magnets push or pull without touching?

Each magnet is surrounded by an invisible magnetic field that stretches into the space around it. When the field of one magnet reaches another magnet, it causes the attracting or repelling force, even with a gap between them.

Why is iron magnetic but most other materials are not?

Iron contains billions of tiny magnetic regions called domains. When these domains line up and point the same way, the iron acts as a magnet; in materials where they point in random directions, the effects cancel out and there is no magnetism.

Is this topic part of the Singapore primary school syllabus?

Yes. Magnets, magnetic poles, and how like and unlike poles repel and attract are covered in the magnetism section of MOE Primary Science, usually in the upper primary years.

Why Magnets Attract And Repel

Science Interactive lesson Free to play

Magnets attract and repel because of their poles. Every magnet has two poles — a North pole and a South pole — and they always come as a pair, so you can never have just one on its own. The simple rule is: opposite poles (North and South) pull together, while like poles (North and North, or South and South) push apart. This pulling and pushing happens without the magnets even touching.

The force works through an invisible magnetic field that surrounds every magnet and reaches into the space around it. A material is magnetic in the first place because of tiny regions inside it called domains. Inside iron, billions of these tiny magnets can line up to point the same way; in an ordinary nail they point in all directions and cancel each other out, so it shows no magnetism.

Understanding poles, the attract-and-repel rule, magnetic fields and domains gives Singapore primary learners the foundation for the magnetism topic in MOE Primary Science, and helps explain everyday objects like fridge magnets, compasses and door catches.

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What this Spark covers

Magic in your hand

🧲✨ Why do magnets stick and push? Have you ever felt two magnets jump together — or push apart like they don't want to touch? That invisible pull and push is a real force. By the end of this Spark you will know exactly why it happens! Let's explore 🔎
Every magnet has two ends

Two ends, two names Every magnet has two poles: a North pole and a South pole. They are always a pair — you can never have just one! Tap each end of the magnet to name it 👇 ? ?
The magnet rule

The golden rule Poles like to follow one simple rule: Opposite poles (N + S) attract — they pull together. 🤝 Same poles (N + N or S + S) repel — they push apart. 🙅 Tap a button to see the rule come alive: Show N + S Show N + N NS SN
You predict!

Your turn to predict 🔮 Two magnets are coming close. Look at the poles that face each other. Will they attract or repel? NS ↔️ NS Attract 🤝 Repel 🙅 Tip: look only at the two poles in the middle that face each other.
The invisible field

An invisible force field Around every magnet is an invisible magnetic field. It reaches out into the space nearby — that's how magnets can pull each other without touching! N S The curved lines show the field flowing from N around to S. Closer magnets = stronger pull or push. The field is strongest right near the poles!
Tiny magnets inside

Why is it a magnet at all? Inside iron there are billions of tiny magnets (we call them domains). In a normal nail they point every which way, so they cancel out. 😕 But when they all line up the same way — boom, you get one strong magnet! 💪 Tap the arrows to line them all up:
You're a magnet master!

🎉🧲 You did it! Here's everything you now know about why magnets attract and repel: 🧲 Every magnet has a North and a South pole — always a pair. 🤝 Opposite poles (N + S) attract. 🙅 Same poles (N + N or S + S) repel. 🌫️ An invisible field lets magnets push and pull without touching. ✨ Inside, billions of tiny magnets line up to make the force. Great work, magnet scientist! 🌟

Frequently asked questions

Why do two magnets sometimes pull together and sometimes push apart?: It depends on which poles face each other. Opposite poles (North facing South) attract and pull together, while the same poles (North facing North, or South facing South) repel and push apart.
Can a magnet have only a North pole or only a South pole?: No. Every magnet always has both a North pole and a South pole as a pair. If you cut a magnet in half, each piece becomes a smaller magnet with its own North and South pole.
How can magnets push or pull without touching?: Each magnet is surrounded by an invisible magnetic field that stretches into the space around it. When the field of one magnet reaches another magnet, it causes the attracting or repelling force, even with a gap between them.
Why is iron magnetic but most other materials are not?: Iron contains billions of tiny magnetic regions called domains. When these domains line up and point the same way, the iron acts as a magnet; in materials where they point in random directions, the effects cancel out and there is no magnetism.
Is this topic part of the Singapore primary school syllabus?: Yes. Magnets, magnetic poles, and how like and unlike poles repel and attract are covered in the magnetism section of MOE Primary Science, usually in the upper primary years.

Why Magnets Attract And Repel

What this Spark covers

Frequently asked questions

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