The normal distribution is sometimes informally called the bell curve. However, many other distributions are bell-shaped (such as the Cauchy, Student's t, and logistic distributions).
One metric ton (also known as a 'Tonne') contains 1000 kg, or 2204 pounds. There are two other types of ton: One Imperial ton (or British ton) equals 2240 pounds, or 1016.3 kg. One short ton contains 2000 pounds, or 907.4 kilogrammes.
I'm pretty sure 1=1 a tonne is a metric tonne equal to 1000Kg or 2204.6lbs We have three different tons:   Long ton, in the United Kingdom Imperial system is 2,240 pounds, exactly 1,016.0469088 kg.   Short ton, in North America is 2,000 pounds or 907.18474 kg.