Refer to the following information for the next question.
So weight is the force of gravity between two bodies, usually some small object in contact with the earth.
If we stand on a weighing scale and find that we are pulled toward the earth with a force of 500 N, then we weigh ____ N. Strictly speaking, we weigh ____ N relative to the earth. But much does the earth weigh relative to us? If we tip the scale upside down and repeat the weighing process, we can say that we and the earth are still pulled together with a force of ____ N, and therefore, relative to us, the whole 6,000,000,000,000,000,000,000,000-kg earth weighs ____ N! Weight, unlike mass, is a relative quantity.