1) The only planet where life exists is _______ a) Earth b) Mercury c) Mars 2) The ______ is the natural satellite of the Earth. a) Moon b) Sun 3) The smallest planet in the solar system is _______. a) Mercury b) Jupiter c) Mars 4) The Earth is in a galaxy called ______. a) Andromeda b) Milky way 5) _______ is the only star in our solar system. a) Sun b) Moon c) Earth 6) Our planet Earth takes _______ days to complete one orbit around the Sun. a) 365 days b) 100 days c) 88 days d) 1 day 7) Is it always possible to accurately show information on a scientific model? a) No b) Yes

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