"Magnetism": HTML5 Crossword

Across

5. A temporary magnet created by running current through coiled wires. The strength can be increased by increasing the flow of current or the number of coils. (13)
7. Rocks that attract iron, nickel, or cobalt. Example is magnetite from the ore called lodestone. (7,6)
9. the flow of electrons through a conductor. (8,7)
13. the attraction caused by a magnetic force on an iron, cobalt or nickel object. (8,10)
15. Where the magnet is the strongest and lines are closest together. (5)
16. a navigational instrument that has a magnetized hand that spins to locate geographic north using Earth's magnetic field. (7)

Down

1. a machine that usually uses a spinning rotor with a magnet inside a coil of wire to produce electricity. (9)
2. the force of repulsion (pushing) or attraction (pulling) between poles of magnets. (9)
3. like charges do this. (5)
4. Imaginary lines used to illustrate and describe the pattern of the magnetic field. The magnetic lines of force are assumed to come from the north pole of a magnet, pass through surrounding space, and enter the south pole. (8,5,5)
6. the space around a magnet in which magnetic forces are exerted. (8,5)
8. Colored light produced by charged particles from the solar wind and from the magnetosphere that react with and excite the oxygen and nitrogen of Earth's upper atmosphere; usually seen in the sky near Earth's magnetic poles. Also called the "Northern Lights." (6,8)
10. a device that contains a rotating electromagnet that changes electrical energy to mechanical energy. (8,5)
11. A region in which the magnetic fields of all atoms are lined up in the same direction. (8,6)
12. Region of space affected by Earth's magnetic field. (13)
14. opposite poles do this. (7)