If the chemical sodium is dropped into water it will immediately and violently explode.
67
Iron weighs more after it rusts.
68
One ragweed plant can release as many as one billion grains of pollen!
51
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Balsa wood is classified as a hard wood!
41
Sound travels about 4 times faster in water than in air.
408
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15