Which of the following statements describes the state of matter known as gas? A. Gas is the state of matter that has a definite shape and volume.
B. Gas is the state of matter that has no definite shape or volume.
C. Gas is the state of matter that has less mass than the liquid from which it forms.
D. Gas is the state of matter that has more mass than the liquid from which it forms.

It was necessary to redeem the world and he knew that his son was the only way

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.