Cold water weighs more than hot water.
93
A cubic yard of air weighs about 2 pounds at sea level.
31
Sound at the right vibration can bore holes through a solid object.
134
Pure water (H2O) does not conduct electricity on its own.
46
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44