Background Knowledge

3. Magnets come in a variety of sizes, colors, and ____________.
4. _____________is a force that pushes back on an object and slows it down (ex. wheels on a road).
6. Magnets ____________ when they pull at each other and stick together.
10. Maglev trains _______________ above the track to reduce friction.
12. _______________ poles will always attract one another.
15. Electricity can be used to create a powerful ____________.
17. The ___________ two poles always repel one another.
18. Every magnet has two __________ (a north & south pole).

1. Magnets only stick to some ___________ (iron or steel).
2. Maglev means magnetic ______________.
5. A compass needle is a magnet that interacts with ______________'s magnetic field.
7. The objects that stick to the magnet become _____________ magnets.
8. Magnetism is a _______________.
9. Iron can be mixed with other metals to make __________.
11. A force is a push or _______________.
13. When magnets ____________, the pieces still have a north and south pole.
14. Magnetism extends out from a magnet in an invisible field called a ___________________ field.
16. Magnets____________ when they push each other apart.