Can you solve some riddles below?

1. What islands are good to eat? 
2. Why do birds fly South? 
3. What man in the world wore the largest hat? 
4. What God never sees, the king seldom sees and we see every day? 
5. What goes up when the rain comes down? 
6. Which letter is the most useful to a deaf old woman? 
7. What man cannot live inside the house? 
8. Why must a man not tell secrets in a corn field? 
9. What falls on the water and never gets wet? 
10. What does one half of an apple resemble?