1) Gravity is a force that pulls objects together. a) True b) False 2) According to the text, gravity only works...... a) sometimes b) often c) always, forever 3) If you trip, gravity is the reason you.... a) fly to space b) go to the nurse c) fall to the ground 4) Mass is defined as the amount of _________ that something has.  a) oxygen b) luck c) mass d) gas 5) The moon has more mass than the Earth. a) True b) False 6) Everything, including a ball, has some gravity. a) True b) False 7) If you throw something from a spaceship, it might go a) blow up b) end up in your cereal c) on forever

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