Here's the breakdown:

* Mass: A fundamental property of matter that measures its resistance to acceleration. It's essentially how much "stuff" is in an object.

* Force of Gravity: The force of attraction between any two objects with mass. The more mass an object has, the stronger its gravitational pull.

Here's the key: The force of gravity acting on an object is called its weight, not its mass.

Example:

* Your mass stays the same whether you're on Earth or the Moon.

* Your weight, however, is different on Earth and the Moon because the gravitational pull is different.

Let me know if you have any other questions!