1) What world has the largest amount of dry, solid ground? a) Mercury b) Venus c) Earth d) The Moon e) Ceres f) Ganymede 2) Jupiter's light is ____ compared to Earth a) 5 times weaker b) 25 times weaker c) 125 times weaker d) 5 times stronger e) 25 times stronger f) 125 times stronger 3) Why do moons tear apart when they pass the Roche limit? a) Their tides are taller than the moon is wide b) Crowded airspace; more frequent collisions c) The gas giants' magnetic field starts to eat away at the rocks d) Aerobraking 4) What planet turns on its axis the slowest? a) Jupiter b) Saturn c) Earth d) Mars e) Venus f) Mercury 5) On what world does the Sun rise in the West? a) Mercury b) Venus c) Earth d) The Moon e) Ceres f) Mars 6) Venus' atmosphere is mostly ____ which is poisonous to humans a) CO2 b) N2 c) CH4 d) H2SO4 e) HCN f) O3 7) What kind of moon orbits in the gaps in a ring? a) Surfer moon b) Ring moon c) Gap moon d) Void moon e) Shepherd moon f) Warden moon 8) What planet has more mass than all the other planets put together? a) Ceres b) Mercury c) Jupiter d) Mars e) Earth f) Saturn 9) The only moon with an atmosphere orbits which planet? a) Mercury b) Venus c) Earth d) Mars e) Jupiter f) Saturn 10) The moon with an ocean twice as large as Earth's orbits which planet? a) Mercury b) Venus c) Earth d) Mars e) Jupiter f) Saturn 11) The moon with active volcanoes orbits which planet? a) Mercury b) Venus c) Earth d) Mars e) Jupiter f) Saturn 12) How many moons does Mars have? a) 0 b) 1 c) 2 d) 3 e) 5 f) 4 13) What world has too much gravity for its size? a) Mercury b) Venus c) Earth d) Mars e) Jupiter f) Saturn 14) Which of the following is not a planet? a) Mercury b) Venus c) Earth d) Mars e) Ceres f) Jupiter 15) Titan's atmosphere is made out of a) liquid water b) steam c) carbon dioxide d) nitrogen gas e) oxygen gas f) sulfur hexafluoride 16) What is the only moon with a substantial magnetic field? a) Io b) Callisto c) Europa d) Ganymede e) Titan f) The Moon 17) Why is the Moon bad for growing plants? a) Plants don't grow well at its distance from the Sun b) Constant meteor showers c) A total absence of water d) A night long enough to starve plants 18) What kind of biosphere might exist on Europa? a) Rainforest b) Desert c) Hydrothermal vent d) Kelp forest e) Savannah f) Steppe 19) Which moon has a surface covered in sulfur volcanoes? a) Rhea b) Io c) Titan d) Europa e) Deimos f) Ganymede 20) The asteroid belt is what's left of a a) comet b) planet c) star d) ejected moons 21) Venus' atmosphere is ___ times thicker than Earth's a) 2 b) 4 c) 8 d) 90 e) 92 f) 94 22) Titan's atmosphere is ___ of Earth's a) 15% b) 38% c) 47% d) 150% e) 300% f) 9400% 23) A planet with an atmosphere that is 1% of Earth's a) Mercury b) Venus c) Mars d) Jupiter e) Saturn f) Uranus 24) What is the Kuiper belt (KEIGH-per belt)? a) a shattered planet between Mars and Jupiter b) A sphere of comets out past Pluto c) a ring of dwarf planets and asteroids at the edge of the solar system d) A bunch of ice asteroids past Saturn 25) The bright shiny chemical on Ceres proved to be a) water ice b) baking soda c) dry ice d) exposed rock 26) What world is the closest to Earth? (Read carefully) a) Mercury b) Venus c) The Moon d) Ceres e) Jupiter f) Haumea 27) What is the closest planet to all other planets? a) Mercury b) Venus c) Earth d) The Moon e) Io f) Titan 28) What world puts off more energy than it gets from the Sun? a) Jupiter b) Venus c) Mercury d) Earth e) Mars f) Ceres 29) Ceres was thought to be a ___ then a ____ then a ___ a) dwarf plant, asteroid, true planet b) dwarf planet, true planet, asteroid c) asteroid, true planet, dwarf planet d) asteroid, dwarf planet, true planet e) true planet, dwarf planet, asteroid f) true planet, asteroid, dwarf planet 30) If you need metal, what type of asteroid should you mine? a) C-class b) S-class c) M-class d) J-class 31) What class of asteroid does not exist? a) C-class b) S-class c) M-class d) J-class 32) What is the only moon with an atmosphere? a) Luna b) Io c) Europa d) Ganymede e) Callisto f) Titan 33) Which is the bigger world? a) Mercury b) Ganymede 34) Rings are created when a) moons pass the Roche limit b) moons pass the Holden limit c) moons pass the Mohorovicic limit d) moons pass the Curie limit e) moons pass the Gauss limit f) moons pass the Einstein limit 35) Tidal locking happens when a) rotational speed and orbital speed match b) a moon gets too close to its planet c) tides create heat through friction d) another moon pulls away from the planet 36) What planet has a surface covered in perchlorates? a) Mercury b) Venus c) Mars d) Earth e) Jupiter f) Neptune 37) What world traps the most heat from the Sun? a) Mercury b) Venus c) Earth d) Mars e) Ceres f) Phobos 38) Which of the following is a moon of Mars? a) Luna b) Io c) Ganymede d) Titan e) Rhea f) Phobos 39) This world is so far from the Sun its atmosphere routinely freezes a) Mercury b) Venus c) Earth d) Mars e) Jupiter f) Pluto 40) What direction does a comet's tail point? a) Behind it as it moves b) In front of it as it moves c) Towards the Sun d) Away from the Sun e) Up f) Down

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