The Major Tool of Science, that of Measurements

The process of obtaining numerical values representing physical properties is called measurement. These properties include such things as length, mass, or time, by way of a unit of measurement. A unit of measurement is a magnitude representing a physical quantity by use of a standard for measurement of that physical quantity. A measuring device is a piece of equipment used to measure a physical quantity based on a standard for measurement.

 Measurement and Objectivity

Measurement is the most objective part of science since the resulting numbers are what they are. Using mechanical devices for measurement improves objectivity by removing human subjectivity. The validity of a measurement is only as valid as the theory behind it.