Which of the following is an example of a chemical change? a. water evaporating from a puddle on a hot day b. burning a piece of toast c. cracking open an egg and removing the yolk d. steam condensing on the bathroom mirror

The answer will most likely be A: water evaporating from a puddle on a hot day. When water evaporates, it turns into vapor.

The answer would most likely be A

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.