Raven's grandma pins a drawing to her fridge with a magnet. Rocket points. "That magnet solves a problem!"
"What problem?" Raven asks. "What do you notice it does?"
Rocket thinks. "It holds paper up without tape or holes."
Nova blinks happily. "Great discovery!" she says. "Can you find more magnet solutions?"
People use magnets to solve many problems.
A compass uses a magnet needle to help travelers find north.
A fridge magnet holds up papers without tape.
Magnets are also inside many motors and speakers.
| Problem | Magnet solution |
|---|---|
| Which way is north? | A compass needle points north. |
| How do I hold up this drawing? | A fridge magnet holds it. |
| How do I get clips out of a jar? | A magnet grabber lifts them. |
A magnet solution works because of a magnet idea.
A compass works because Earth is a giant magnet.
A magnet grabber lifts clips because magnets attract steel.
A magnet sorter leaves foil behind because magnets do not attract aluminum.
| Statement | True or false? |
|---|---|
| A compass needle is a magnet. | ? |
| A magnet can hold a drawing on a fridge. | ? |
| Magnets are found inside many motors. | ? |
| A magnet grabber would pick up a gold ring. | ? |
Brilliant work, engineer! Tomorrow is Launch Lab, where your family designs a magnet latch.