End Of Semester Riddles!

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Across
  1. 1. You bury me when I am alive, and dig me up when I am dead. What am I?
  2. 6. What five-letter word becomes shorter when you add two letters to it?
  3. 8. Which word in the dictionary is spelled incorrectly?
  4. 10. What can't walk but can run?
Down
  1. 2. What goes up but nevr comes down?
  2. 3. What is always coming but never arrives?
  3. 4. What can fill a room but doesn't take up any space?
  4. 5. What goes up when rain comes down?
  5. 7. What building has the most stories?
  6. 9. What has two hands, a round face, always runs, but stays in place?