Razi

Mass

1. Mass is the amount of matter in an object.

2. It is always the same, anywhere in the universe.

3. Mass is measured in kilograms (kg).

4. It does not depend on gravity.

5. Example: A stone has the same mass on Earth and the Moon.

Weight

1. Weight is the force of gravity on an object’s mass.

2. It can change depending on gravity.

3. Weight is measured in newtons (N).

4. Formula: Weight = Mass × Gravity.

5. Example: The same stone weighs less on the Moon than on Earth.