The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Pumice is the only rock that floats on water.
14
One cubic foot of gold weighs more than 1,200 pounds!
78
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Sound travels about 4 times faster in water than in air.
408
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The sun is 330,330 times larger than the earth.
75