Every field of science involves taking measurements, understanding them, and communicating them to others. In other words, we all have to speak the same basic language. Whether you are a chemist, a physicist, a biologist, an engineer, or even a medical doctor, you need a consistent way of communicating size, mass, shape, temperature, time, amount, energy, power, and speed.
Units of the SI System
The SI system was developed so that all scientists could measure in the same way and understand the measurements of others. There are seven base units in the SI system: