Three Anacharis plants were placed inside test tubes filled with water. once test was exposed to low light, one to medium light, and another was exposed to high light. the table shows the results of experiment. based on the information shown, what was the difference in volume (in ml) of oxygen produced between the low light plants and high light plants after 45 minutes?

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. 

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The answer is c - the principal of original lateral continuity.