Which of the following would cause the greatest decrease in gravitational force between the earth and the moon?
an increase in the earth's mass
an increase in the moon's mass
an increase in the distance between the earth and the moon
a decrease in the distance between the earth and the moon
an increase in the earth's mass
an increase in the moon's mass
an increase in the distance between the earth and the moon
a decrease in the distance between the earth and the moon
