Match these items. 1. de magnete (a) magnetite 2. iron oxide (b) demagnetize 3. man-made magnet (c) william gilbert 4. strength decreases rapidly with distance (d) oersted 5. lines representing the strength and direction of magnetic field (e) lines of force 6. drop or hammer (f) electromagnet 7. small region within a magnet (g) inverse square 8. current-carrying wire has a magnetic field (h) supermagnet 9. very cold (i) domain

WILLIAM GILBERT

De Magnete

MAGNETITE

iron oxide

ELECTROMAGNET

man-made magnet

INVERSE SQUARE

strength decreases rapidly with distance

LINES OF FORCE

lines representing the strength and direction of magnetic field

DEMAGNETIZE

drop or hammer

DOMAIN

small region within a magnet

OERSTED

current-carrying wire has a magnetic field

SUPERMAGNET

very cold

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."