Here's why:
* Metric System: The metric system is based on powers of 10.
* 1 centimeter (cm) = 10 millimeters (mm)
* 1 millimeter (mm) = 1000 micrometers (µm)
* Smaller units: There are units smaller than a micrometer, like nanometers and picometers, but these are significantly smaller than 1/10th of a centimeter.
So, to express a distance 10 times smaller than a centimeter, you could say:
* 1 millimeter: This is the most common and practical way.
* 0.1 centimeters: This is another way to express it, but using millimeters is generally preferred.
