Pumice is the only rock that floats on water.
14
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The force of a suction cup is calculated using F=AP.
15
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Pure water (H2O) does not conduct electricity on its own.
46
A ball of glass will bounce higher than a ball made of rubber.
73
Billions of neutrinos pass unnoticed through your body every second.
6