1) What is at the centre of the solar system? a) The Earth b) The Sun c) The Moon 2) Which are the terrestrial planets? a) Pluto and Eris b) Jupiter, Saturn, Uranus and Neptune c) Mercury, Venus, Earth and Mars  3) Which planets are known as the gas giants? a) Mercury, Venus, Earth and Mars b) The Sun and the Moon c) Jupiter, Saturn, Uranus and Neptune 4) Which is the largest planet in the solar system? a) Jupiter b) Saturn c) Earth 5) Which is the hottest planet in the solar system? a) Venus b) Jupiter c) Earth 6) What force hold planets in orbit around the Sun? a) Air resistance b) Gravity c) Friction 7) The gas planets are found.. a) closest to the sun b) furthest from the sun c) orbiting the Earth 8) Why could you not stand on the surface of a gas planet? a) There is no air b) The surface isn't solid c) They're too far away

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