4.
two things rubbing on another
5.
pulls you towards earth
6.
what a magnet used to attract
7.
amount of electricity in something
8.
height or distance in a wave through the middle
10.
how fast the object changes position
11.
negative charge in an atom
12.
the amount of electric charge through a conductor
13.
a south end is_____ to a north end
14.
a south end is_____ to a south end
15.
the amount of matter in an object
