1) What is the hottest planet? a) Mars b) Venus c) Mercury d) Earth 2) What are the slowest planets? a) Mercury and Earth b) Jupiter and Saturn c) Uranus and Neptune d) Venus and Mars 3) What is the biggest planet? a) Earth b) Saturn c) Uranus d) Jupiter 4) What's the coldest planet? a) Neptune b) Uranus c) Saturn d) Jupiter 5) Which planet is closest to the sun? a) Mercury b) Earth c) Venus d) Mars 6) Which planet is furthest from the sun? a) Saturn b) Uranus c) Neptune d) Jupiter 7) How long does Earth take to orbit the sun? a) 1 year b) 88 days c) 365 days d) 164 years 8) How many moons does Jupiter have? a) 1 b) 9 c) 67 d) billions 9) How many galaxies do scientists believe there are? a) hundreds b) thousands c) millions d) billions 10) Why do planets orbit the sun? a) gravity b) asteroids c) comets d) meteors

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