riddle me up

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Across
  1. 5. i am soft and fluffy, i am found in the first layer
  2. 7. my name is the refrigerator
  3. 11. cause you're hot and you're cold
  4. 12. i rise and fall
  5. 15. my top is rather cold
  6. 16. layer i am the knight of the earth
  7. 17. without me, your life is at stake
  8. 18. i want to breath you like a vapor
  9. 19. decayed yet still useful
Down
  1. 1. moo said the cow
  2. 2. holding on for dear life is nice, but i am the product of industrializing
  3. 3. i am great and characterized as a hero at first, now i am villanous
  4. 4. i am the root of all these
  5. 5. 'all for one, one for all' describes me
  6. 6. i am enormous, but i melt
  7. 8. i am a fan of ed sheeran for i divide
  8. 9. i am the white home
  9. 10. the earth has a fever, and i am the effect
  10. 13. now you see me, now you don't, i am present in large amounts
  11. 14. i drop and protect