In zero gravity, a candle's flame is round and blue.
16
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
A cubic yard of air weighs about 2 pounds at sea level.
31
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Out of all the senses, smell is most closely linked to memory.
146
Iron weighs more after it rusts.
16
Scientists in Germany have developed a candy that doesn't cause cavities.
11