One cubic foot of gold weighs more than 1,200 pounds!
78
One barrel of petroleum holds 42 gallons.
20
Pumice is the only rock that floats on water.
14
Pure water (H2O) does not conduct electricity on its own.
46
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75