Neil's Crossword on Random Things

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Across
  1. 2. glowing remains of fire
  2. 4. a raw form of minerals
  3. 6. the marine mammal which sleeps with 1 eye open
  4. 8. The galaxy we live in
  5. 11. a cowboy contest
Down
  1. 1. the result of adding a combination of numbers
  2. 3. the arboreal animal with the longest tail
  3. 5. a book used for collecting photos and stamps
  4. 6. the result of subtracting some numbers
  5. 7. a rope used to lead a dog
  6. 9. a jedi master in star wars films
  7. 10. an article used with words starting with a vowel