-- Core --

✔

State that mass is a measure of the quantity of matter in an object at rest relative to the observer.

State that weight is a gravitational force on an object that has mass.

Define gravitational field strength as force per unit mass; recall and use the equation g = W/m and know that this is equivalent to the acceleration of free fall.

Know that weights (and masses) may be compared using a balance.

-- Extended --

✔

Describe, and use the concept of, weight as the effect of a gravitational field on a mass.