S1:          A force of exists between everybody in the universe. P :           Normally it is very small but when the one of the bodies is a planet, like earth, the force is considerable. Q :          It has been investigated by many scientists including Galileo and Newton. R :          Everything on or near the surface of the earth is attracted by the mass of earth. S :           This gravitational force depends on the mass of the bodies involved. S6:          The greater the mass, the greater is the earth’s force of attraction on it. We can call this force of attraction gravity. The Proper sequence should be: