The sun is , a star, a planet, The earth's ____________________ layer protects us from the high radiation of the sun, Troposphere , Exosphere , Ozone, The sun does not help plants grow., True, False, The Sun's energy is created by the ______________ fusion of hydrogen and helium , Nuclear  , Cellular , Element , The sun gives us light and heat , False, True, The Sun's core is the ____________ layer , coldest , biggest , hottest , The sunlight needs ___________________ to reach Earth , 8 minutes , 8 hours , 3 minutes , The sun is the biggest star on space, True, False, The Sun's age is ___________________ years , 8 billion , 150 billion , 4.5 billion .

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