In the scenario where Kevin can instantly transport himself between Planet X and Planet Y, the statement that can be said about Kevin is:
Kevin’s weight may change between Planet X and Planet Y.
Weight is the force exerted on an object due to gravity, and it depends on the gravitational pull of the planet he is on. If Planet X and Planet Y have different gravitational strengths, Kevin's weight will be different on each planet.
On the other hand, Kevin’s mass (the amount of matter he contains) remains constant regardless of his location, so that statement is incorrect. His volume and the matter he consists of would also remain unchanged, as they pertain to the same principle.
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