The measure of how much gravitational force is exerted on an object is called weight.

Here's why:

* Weight is the force of gravity acting on an object's mass.

* Mass is a fundamental property of matter, representing the amount of "stuff" in an object.

* Gravity is the force of attraction between any two objects with mass.

So, while mass remains constant, weight can vary depending on the strength of the gravitational field. For example, an object on the moon would have a lower weight than on Earth because the moon's gravitational field is weaker.