Weight is the gravitational force exerted on a person or object at the surface of a planet. The equation is Weight= Mass x Acceleration due to gravity.
Gravity is the force by which a planet or other body draws objects to its center.
Gravity keeps this tipi from floating of the ground.
Mass is the amount of matter in an object. The SI unit of mass is the kilogram. Gravitational force depends on distance between the objects. The farther apart the two objects are the lasses the gravitational force between them.
Weight is measured in newtons and mass is in kilograms. Unlike mass, weight varies with the strength of the gravitational force.