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) Mercury, Venus, Earth and Mars. b) Pluto and Eris. c) Jupiter, Saturn, Uranus and Neptune. 3) Which planets are known as gas giants? a) The sun and the moon. b) Jupiter, Saturn, Uranus and Neptune. c) Mercury, Venus, Earth and Mars. 4) Which is the largest planet? a) Saturn b) The Sun c) Jupiter 5) Which is the hottest planet? a) The Sun b) Venus c) Jupiter 6) Where are most asteroids found? a) Over the equator. b) Between the orbits of Venus and Earth. c) Between the orbits of Mars and Jupiter. 7) What are comets? a) Icy objects which orbit very far from the Sun. b) Rocky objects that orbit very far from the Sun. c) Icy objects which are found in the asteroid belt. 8) What force holds planets in orbit around the Sun? a) Friction b) Gravity c) Air resistance 9) Which famous scientist first developed many ideas about gravity and orbits? a) Brain Cox b) Stephen Hawkins c) Issac Newton 10) Which planet is closest in size to Earth? a) Mars b) Neptune c) Venus

Solar System

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