what measures the quantity of matter
http://www.reference.com/science/measure-quantity-matter-a32436ad3bf66292
The quantity of matter is commonly measured using the unit called "mass." Mass is a fundamental property of matter that quantifies the amount of material it contains. In scientific terms, mass refers to the measure of an object's inertia, which is its resistance to changes in motion.
There are various instruments and techniques to measure mass depending on the level of accuracy required. The most widely used instrument for measuring mass is a balance or a scale. A balance compares an unknown mass with known masses, while a scale uses springs or load cells to determine the weight of an object, which is directly proportional to its mass under normal gravitational conditions.
To measure the mass of an object using a balance or scale, follow these steps:
1. Ensure that the balance or scale is at equilibrium and properly calibrated.
2. Place the object you want to measure on the balance or scale gently, making sure it is stable and centered.
3. Allow the balance or scale to settle and display the measurement.
4. Read and record the mass value shown on the display.
It is important to note that mass is different from weight. Mass is a constant property, while weight depends on the gravitational force acting on an object. If you want to measure mass in more precise scientific terms, you can use techniques such as gravitational methods, inertial methods, or even quantum mechanical methods.