The term that describes the measure of force and gravity acting on the mass of a substance is weight.

Here's why:

* Force: Weight is a force, specifically the force exerted on an object due to gravity.

* Gravity: The gravitational force pulls objects towards each other. On Earth, this means objects are pulled towards the planet's center.

* Mass: Mass is a measure of the amount of matter in an object. It's a fundamental property that doesn't change depending on location.

In summary: Weight is the result of the gravitational force acting on an object's mass. It's a force that is dependent on both gravity and mass.