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Guided notes: magnets intro
Name: ________________________________ date: __________________ per: ________
1. Magnetic force is:
2. All magnets have _______ magnetic poles, regions where the magnet’s force is __________________________.
3. A ________________________________ ______________________ surrounds a magnet and can exert
magnetic forces.
4. Magnetic field lines begin near the ___________________ pole and extend toward the ________________ pole.
• The arrows on the field lines indicate what direction a ____________________________
_________________________ would point at each point in space.
• Where lines are close together, the field is ___________________________.
• Where lines are more spread out, the field is ____________________________.
5. A magnetic field surrounds every magnet. Iron filings reveal the field lines, which start near the
________________ ________________________ and extend toward the south pole.
A. When _________________ poles of two magnets come together, the magnets
____________________________ each other.
B. When ___________________________ poles of magnets come together, the magnets
____________________________each other.
6. Earth is surrounded by magnetic field lines. These lines are ___________________________ at the poles.
7. Is the magnetic north the same as the geographic north? ______________________
8. Why are some materials magnetic while others are not?
9. When a material is magnetized, most of its _____________________________ ______________________ are
aligned.
10. A ___________________________________ material, such as ________________________, can be magnetized
because it contains magnetic domains.
11. If the domains of a ferromagnetic material are aligned randomly, it is not a ___________________________.
12. Magnetization can be _________________________. If the material is moved away from the magnet, the
magnetic domains become _________________________________.
13. In some ferromagnetic materials, the domains stay aligned for a long time. These materials are called
_______________________________________ magnets.
14. Label the pictures below:
15. If you cut a magnet in half, each half will have its own ____________________________ and
______________________.