If the chemical sodium is dropped into water it will immediately and violently explode.
67
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A ball of glass will bounce higher than a ball made of rubber.
73
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
The only letter not appearing on the Periodic Table is the letter "J".
180
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One 75-watt bulb gives more light than three 25-watt bulbs.
57