• English World 4 Unit 10
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  • What is a large, round mass of rock and metal, such as Earth, or of gas, such as Jupiter, that moves around the sun or another star?
    a planet
  • What is a comet?
    a ball of frozen dust and rock that orbits the sun and has a tail that glows
  • Spell the word to describe a person who is trained to travel into outer space
    astronaut
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