It measures pain.
How do they measure what?
Meters measure length, liters measure capacity, and kilograms measure weight.
It is an approximate measure of elasticity.It is an approximate measure of elasticity.It is an approximate measure of elasticity.It is an approximate measure of elasticity.
A seismometer would measure earthquakes, but there is no such activity on the moon to measure.
4 ounces of ricotta is a weight measure.