Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
A ball of glass will bounce higher than a ball made of rubber.
73
Diamonds can be shattered with a hammer.
-104
Sound travels fifteen times faster through steel than through air.
134
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
One third of the electricity produced on earth is used to power electric light bulbs!
75