The measure of the force that gravity exerts on an object is called weight.

Here's the breakdown:

* Gravity: A fundamental force that attracts objects with mass towards each other.

* Weight: The force of gravity acting on an object's mass.

Important distinction:

* Mass is a measure of the amount of matter in an object and remains constant.

* Weight is a force and depends on both the object's mass and the gravitational acceleration it experiences.

Formula:

Weight (W) = Mass (m) x Acceleration due to gravity (g)

Example:

* A person with a mass of 70 kg on Earth, where the acceleration due to gravity is approximately 9.8 m/s², would have a weight of:

W = 70 kg x 9.8 m/s² = 686 N (Newtons)