Describe a change caused by kinetic energy as well as a change caused by potential energy.

Kinetic energy is an object in motion, potential energy is the potential for energy. Energy is the ability to make change, so kinetic energy is in the process of impacting something else.

Two atoms colliding is an example of a change in kinetic energy. The movement of an electron away/towards the nucleus is a change in potential energy.

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. 

Thermohaline circulation and gyres