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Life Out There

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    Life Out There
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  • Earth is a ______
    planet
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  • Planets _______ the sun.
    orbit
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  • The sun and planets make up our _____-_____ .
    solar system
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  • Earth has a(n) _______ with oxygen to breathe.
    atmosphere
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  • A ______ is made up of stars and solar systems.
    galaxy
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  • There are lots of galaxies in the ______ .
    universe
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  • A cloud of rock, ice and gas make up a ______.
    comet
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  • A ______ around the sun takes many earth years.
    journey
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  • Scientists know when comets will appear because they keep ______ .
    data
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  • Some people think that ______ may live on other planets.
    extraterrestrials
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  • Many people _______ the question about extraterrestrials living on other planets.
    debate
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  • One day, we may land a _____ on the moon again.
    spacecraft
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  • People perform experiments in space on the _____.
    space station
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  • The Mars rover _____ with computers on Earth.
    communicates
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  • A(n) _____ is someone who travels in space.
    astronaut
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  • The rover _____ for life on Mars.
    searches
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