Cold water weighs more than hot water.
93
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Hot water can freeze faster than cold water.
181
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
The earth is approx. 6,588,000,000,000,000,000 tons.
175
One cubic foot of gold weighs more than 1,200 pounds!
78