Good Riddles

Question: A man has 3 children and half of them are girls, how is this possible?

Question: You are trapped in a room. There are two doors. If you go in one door, a dragon is going to breath fire on you. If you go into the other door, there is a room made of magnifying glass. And the sun is reflecting off of it and will burn you. How do you escape?

Question: What sound does a nut make when it sneezes?

Question: I turn polar bears white
and I will make you cry.
I make guys have to pee
and girls comb their hair.
I make celebrities look stupid
and normal people look like celebrities.
I turn pancakes brown
and make your champagne bubble.
If you squeeze me, I'll pop.
If you look at me, you'll pop.

Can you answer the riddle?

Question: I'm a measurement of time.
But you'll find me on a map, not a clock.

What am I?