He is known as an eccentric artist.

His eccentric behavior sometimes confuses people.

A femtometer is a unit of length, equal to 10 to the negative 15th power of a meter.

The top quark is the heaviest quark in particle physics.

This bacterium is about 1 micrometre in size.

It's 5 kilometers from my house to school.

Strontium is one of the elements abundantly present in the earth's crust.

He loves extreme sports.

The thickness of this notebook is about 10 millimeters.

He chose to discard the shadow for the substance.