Suppose that a different student obtained reaction
rates for the particle-size experiment, and that
these rates did not show a pattern. Check all
possible sources of this error.
Some of the broken tablet was not added to
the water.
The tablet was not crushed enough to make
a substantial difference
The size of the reaction beaker was varied.
The tablets were not uniform in their mass.

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. 

Idk the answer imthink snail cant mate they dont lol