Answer: Mass is the amount of matter in a body; weight is the gravitational force with which the earth pulls it.
| Mass | Weight |
|---|---|
| Amount of matter in a body. | Force with which a planet attracts the body (W = mg). |
| Scalar quantity. | Vector quantity, directed towards the centre of the planet. |
| Same everywhere in the universe. | Changes with g, so it differs from place to place (it is zero where g = 0). |
| SI unit: kilogram (kg). | SI unit: newton (N). |