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GCSE Physics · key term
The amount of matter in an object, measured in kilograms (kg).
Used by AQA, Edexcel and OCR
Specification 4.3.1.1, 4.5.1.3, 4.5.7.1 · Paper 1, Paper 2
Revise: Density and the Particle ModelA block of wood and a metal block can have the same volume but very different masses. The metal block usually has more mass packed into that volume, so it has a greater density. Density therefore connects two measurements: mass and volume.
The amount of matter in an object, measured using a balance.
Specification 2.4, 2.15, 2.16, 2.18, 2.19, 2.24, 3.2, 7.1P, 8.9, 14.2 · Paper 1, Paper 2
The amount of matter in an object; it is a scalar.
Revise: Recalling Vector and Scalar QuantitiesMass tells us how much matter an object contains. It has magnitude but no direction, so it is a scalar and is measured in kilograms.
A measure of how difficult it is to change an object's velocity, measured in kilograms (kg).
A measure of the amount of matter in an object; it is measured in kilograms (kg).
A measure of the amount of matter in a body, measured in kilograms (kg); it does not change when the body moves between gravitational fields.
A measure of the amount of matter in an object and of how difficult it is to accelerate; its unit is the kilogram, kg.
The amount of matter in an object, measured in kilograms (kg). Mass is a scalar quantity.
The quantity of matter in an object, measured in kilograms (kg).
The amount of matter in an object, measured in kilograms (kg). It does not change when the object moves to another world.
The quantity of matter in an object, measured in kilograms (kg) in the density equation.
Specification P1.1b, P1.1f, P2.2i, P2.2l, P2.3h, P2.3j · Paper 1 (Foundation), Paper 3 (Higher)
A measure of how much matter an object contains.
Revise: Atomic structureAlthough the nucleus occupies only a minute fraction of the atom's size, it contains almost all the atom's mass. Protons and neutrons are far heavier than electrons, whose contribution to the total mass is very small.
The amount of matter in an object, measured in grams or kilograms.
A measure of the amount of matter in an object, measured in kilograms (kg).
A measure of the amount of matter in an object and of its resistance to acceleration, measured in kilograms (kg).
A measure of the amount of matter in an object, measured in kilograms (kg); it does not change when the object moves to a different gravitational field.
The amount of matter in an object, measured in kilograms (kg); it does not depend on gravitational field strength.
Paper 1, Paper 2
A measure of the quantity of matter in an object, measured in kilograms (kg).
Revise: ForcesIn a gravitational interaction, two masses attract one another. Earth pulls a falling object downwards, while the object pulls Earth upwards with an equal gravitational force. The effect on Earth is normally much less noticeable because Earth has such a large mass.
Write the equation before substituting, and make sure mass is in kg and volume is in m³ when density is required in kg/m³.
When explaining a density difference, link particle spacing to the mass contained in a given volume. Do not merely state that one material is denser.
If matter changes state in a closed system, its mass is conserved. A density change must therefore result from a change in volume.
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