The measure of the force gravity acting on mass is called weight.

Here's a breakdown:

* Gravity: A fundamental force that attracts any two objects with mass.

* Mass: A measure of the amount of matter in an object.

* Weight: The force exerted on an object due to gravity.

Formula for Weight:

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

* g is approximately 9.8 m/s² on Earth. This means that for every kilogram of mass, the Earth exerts a force of 9.8 Newtons.

Key Points:

* Weight is a force, measured in Newtons (N).

* Mass is a property of an object, measured in kilograms (kg).

* Weight varies depending on the gravitational field. For example, you would weigh less on the Moon because the Moon has weaker gravity than Earth.

Let me know if you'd like more details or examples!