Cold water weighs more than hot water.
93
Sound travels about 4 times faster in water than in air.
408
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Indoor pollution is 10 times more toxic than outdoor pollution.
62
4.5 pounds of sunlight strike the Earth each day.
27
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65