Maria works in a hardware store. A bin of aluminum nails and a bin of iron nails are knocked over, and the nails get mixed up. Both sets of nails are the same color and size. What makes separating the nails a fairly easy job?
Answer
A
Aluminum is magnetic, and iron is non-magnetic.
B
Aluminum is heavier and iron is lighter.
C
Iron is magnetic, and aluminum is non-magnetic.
D
Iron settles in water, while aluminum floats.
Explanation
Iron is attracted to a magnet, but aluminum is not. Maria can use a magnet to pick up the iron nails and leave the aluminum nails behind, making the separation fairly easy. Choice C states this difference.
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