Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A ball of glass will bounce higher than a ball made of rubber.
73
Most dust particles in your house come from dead skin.
48
Iron weighs more after it rusts.
16
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Pure water (H2O) does not conduct electricity on its own.
46