Cold water weighs more than hot water.
93
Indoor pollution is 10 times more toxic than outdoor pollution.
62
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
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The smell of freshly cut grass is actually a plant distress call.
31
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57