A ball of glass will bounce higher than a ball made of rubber.
73
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Balsa wood is classified as a hard wood!
41
Diamonds can be shattered with a hammer.
-104
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13