The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
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
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Aluminum used to be more valuable than gold!
84
The earth is approx. 6,588,000,000,000,000,000 tons.
175
One barrel of petroleum holds 42 gallons.
20
A ball of glass will bounce higher than a ball made of rubber.
73
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13