1) Which is the biggest planet? a) Jupiter b) Mars c) Neptune 2) Which is the smallest planet? a) Earth b) Venus c) Mercury 3) Earth is the .................. planet from the sun? a) first b) second c) third 4) People who travel to space are called? a) astronauts b) space walkers c) explorers 5) Space has no .......... a) stars b) galaxies c) oxygen 6) The Sun and all the planets are called a) Guardians of the Galaxy b) The Earth System c) The Solar System 7) Space is dark and .......... a) hot b) cold c) warm 8) Planets that go around the Sun a) orbit b) circle c) around 9) We can use this to fly into space a) rocket b) The ISS  c) flying car 10) People want to live on Mars because ...... a) it's red and beautiful b) there's no pollution c) it has ice 11) How many planets are there in our solar system? a) 8 b) 7 c) 9 12) Which planet is missing? Mercury , Venus , Earth , Mars , .................... , Saturn , Uranus , Neptune  a) Pluto b) The Moon c) Jupiter 13) Which planet is missing? Mercury , Venus , Earth , Mars , Jupiter, Saturn , Uranus , ................... a) Mars b) Neptune c) The Sun 14) On Mars , one year is equal to ............... days a) 689 b) 687 c) 365 15) On Mars one day is equal to ............ a) 12 hours  b) 36 hours c) 24 hours 16) Things float in space because there is no ............... a) carbon dioxide b) gravity c) water 17) Astronauts sleep in a ............. a) sleeping bag b) bed c) tent 18) Astronauts have to ................ everyday a) listen to music b) do exercise c) play games 19) Astronauts can drive on Mars with a ........... a) motorbike b) rocket c) rover 20) On Earth we breathe in ................ a) nitrogen b) oxygen c) carbon dioxide 21) Astronauts have to check their ....................... everyday. a) schedule b) food c) sleeping bag  22) One day on Mercury is equal to .................... Earth days. a) 59 b) 55 c) 24 23) One year on Mercury is equal to ......................... Earth days a) 365 b) 98 c) 88 24) A person whose job is to make things is called ................. a) an astronaut  b) an engineer c) a teacher 25) Mars is ......................... million kilometers from Earth a) 460 b) 560 c) 565 26) On Mars scientists can make oxygen from ................... a) nitrogen b) oxygen c) carbon dioxide

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