Iron weighs more after it rusts.
16
Indoor pollution is 10 times more toxic than outdoor pollution.
62
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
No matter how cold it gets, gasoline will not freeze.
107
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57