Gravity attracts all masses, however it is only noticeable with very large objects, such as planets.

On the surface of a planet, Gravity makes all things accelerate towards the ground (all at the same rate, 10 m/s squared on Earth.) And gives everything a weight.

Mass is the amount of matter in a object. An object will have the same mass anywhere in the universe.

Weight is measured in Newtons (N)
which is measured using a newton meter.

The equation for working out weight is: Weight = mass X Gravity Or W = m x g