Many people believe that a large earthquake , often referred to as the Big One , will hit California within the next 100 years . Due to a lack of understanding about the Earth's plates , some wrongly believe that the Big One " will cause California to break off the continent and fall into the Pacific Ocean . Others fear that the transform boundary running through California will open up and the Earth will swallow buildings , people , and cars . Why are these people wrong ?

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.