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In scientific terms, mass is a measure of an object’s resistance to acceleration when a force is applied. It also determines the strength of its mutual gravitational attraction with other bodies. Under ordinary circumstances, the mass of an object is constant and does not change unless the object itself changes by gaining or losing matter.
In physics, mass refers to the amount of matter in an object. The standard unit of measurement for mass is the kilogram. Although the terms mass and weight are often used interchangeably, in science the terms have quite different meanings.
Kids learn about mass and weight in the science of physics and the laws of motion including units and measurement. What is the difference between mass and weight?
Learn about mass, a measurement of how much matter is in something. Discover why mass is important, how mass is measured, units of mass...
Mass and weight are often considered synonymous, but are in fact two different quantities with different units. A mass definition for kids would be that mass refers to the amount of matter in an object. Weight is just the force that gravity applies to the matter within the object.
Mass refers to the weight of an object. It is measured in grams (g) and kilograms (kg). Learn how to calculate mass and more with this handy teaching wiki.
Mass is the amount of matter in an object. Unlike weight, it's not a force. An object's mass has the same value anywhere in the universe.
Mass is the amount of matter in a solid, liquid or a gas. It is measured in kilograms and grams. In everyday life, mass and weight are often interchangeable, but in physics, mass is not the same as weight. In physics, weight is defined as the amount of force exerted on an object due to the pull of gravity and is measured in Newtons.
The mass of an object is a measure of an object's resistance to acceleration, sometimes also called "inertia". A mountain has typically more mass than a rock, for instance. Mass should not be confused with the related but quite different concept of weight. A large mass like the Earth will attract a small mass like a human being with enough ...
The simple definition of mass is the quantity of matter within a given object. Mass is determined by the atomic and molecular makeups of objects. All objects are made up of protons, neutrons, and electrons, and each of these has different makeups and masses.