Which statement correctly distinguishes mass from weight?

1. Mass is the quantity of matter in an object and is measured in kilograms. 2. Weight is the gravitational force acting on that mass and is measured in newtons. 3. Mass does not vary in classical physics, whereas weight varies with the local gravity. 4. That is why a body keeps its mass but loses most of its weight on the Moon. 5. Everyday speech swaps the two words, which is where the confusion begins. 6. Any option that puts mass in newtons or weight in kilograms reverses the units. _Source: OpenStax College Physics (CC BY 4.0), Ch 4 "Dynamics: Force and Newton's Laws of Motion", section 4.3 Newton's Second Law of Motion: Concept of a System_