One 75-watt bulb gives more light than three 25-watt bulbs.
57
Iron weighs more after it rusts.
68
Each day, up to 150 species of life become extinct.
-23
The force of a suction cup is calculated using F=AP.
15
Diamonds can be shattered with a hammer.
-104
For every gallon of sea water, you get more than a quarter pound of salt.
45
Out of all the senses, smell is most closely linked to memory.
146
A single speck of dust is half way in size between a subatomic particle and the Earth.
15