Relative mass - It’s the mass of one object compared to another, Composition - Earth and other planets can be compared according to their what?, Rocky  - Mercury, Venus, Mars and earth are known as the what planets?, Gravity - It gives weight to objects, Gas - Jupiter, Saturn, Uranus and Neptune are known as the what planets?, Rock - Earth is composed of mostly what?, Mercury - Which planet has a very thin atmosphere , Outer - Is Jupiter, Saturn, Uranus and Neptune inner or outer planets?, Inner - Is mercury, Venus, Mars and earth inner our outer planets?, Force - Mass x acceleration =, Sixty seven - How many moons does Jupiter have?, Neptune  - What planted is farthest away from the sun, Saturn - Which planet has has the ring around it?,

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