Unit four crossword

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Across
  1. 6. Water vapor condenses at this temp to form rain
  2. 7. Red giant star, Orion's left shoulder
  3. 8. Constellation visible in winter,_______ the hunter
  4. 9. Gregory IX claimed cats were this
  5. 10. Big ______ Constellation that points to North star
Down
  1. 1. Shortest day of the year, winter_________
  2. 2. Brazil, China, and India are this kind of country
  3. 3. Bird taken into mines to detect Carbon monoxide
  4. 4. France, Australia,Japan are this type of country
  5. 5. First hominid to make stone tools, 2.6 mya