A rock is taken from the Moon back to Earth. Which of the following correctly describes the changes to its mass and weight?

a
Its mass increases, and its weight increases.
b
Its mass has no change, and its weight increases.
c
Its mass decreases, and its weight has no change.
d
Its mass has no change, and its weight decreases

The correct answer is b. Its mass has no change, and its weight increases. This is because the mass of the rock remains the same regardless of its location, but its weight changes due to the difference in gravitational pull between the Moon and Earth. The gravitational pull of the Moon is about 1/6th that of Earth, so when the rock is brought back to Earth, it experiences a stronger gravitational pull, which increases its weight while its mass remains constant.