Balsa wood is classified as a hard wood!
41
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Billions of neutrinos pass unnoticed through your body every second.
6
Iron weighs more after it rusts.
16
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
One ragweed plant can release as many as one billion grains of pollen!
51