Proof of visit

123456789101112
Across
  1. 2. What goes up but never comes down?
  2. 4. What can't talk but will reply when spoken to?
  3. 5. What is always in front of you but can't be seen?
  4. 6. What goes around the world while staying in one corner?
  5. 9. What becomes wet the more it dries?
  6. 10. Say my name and I disappear. What am I?
  7. 12. What can run but not walk?
Down
  1. 1. The more of this there is, the less you see.
  2. 3. I start with the letter 'e' and I end with the letter 'e'. I only contain one letter, what am I?
  3. 7. If you don't keep me, I'll break.
  4. 8. What can fly but has no wings?
  5. 11. I am not alive, but I can grow; I don't have lungs, but I need air; I don't have a mouth but water kills me.