Which property measures the amount of matter an object contains, irrespective of external forces?

• A. Weight
• B. Mass
• C. Volume
• D. Density

Answer: (B)

Mass is the property that measures the amount of matter an object contains, independent of external forces such as gravity. Unlike weight, which can vary depending on the gravitational field strength, mass remains constant regardless of the object's location in the universe. This distinction is crucial in scientific contexts where understanding the fundamental quantity of matter is necessary, such as in calculations involving force, energy, and momentum.

Weight, on the other hand, is a measure of the gravitational force acting on an object and can change depending on the gravitational pull of the planet or environment. Volume refers to the space that an object occupies, which does not directly correlate to the amount of matter it contains. Density is a related concept that measures the mass of an object per unit volume, but it is derived from both mass and volume rather than being a direct measurement of matter.