If an object is transported from earth to the planet Mars, which of the following properties will change?

A. Mass B. Weight C. Volume D. Density

The correct answer is B. Weight is the force of gravity on an object, and since each planet has a different gravitational force, the weight of an object will change depending on what planet it's on. For example, the moon (although not a planet) has only 1/6 the gravitational force that the earth does, so any object on the moon will weigh 6 times less than what it weighs on the earth. However, mass, volume, and density, will not change from place to place, regardless of gravitational force.