Difficult clean riddles for teens with simple answers

You measure my life in hours and I serve you by expiring. I'm quick when I'm thin and slow when I'm fat. The wind is my enemy.

I look taller when I am young. But as I get old, I become shorter and shorter. What Am I?

I am a fruit. Remove my first letter, it's a crime. Remove my first and last letter, it's a kind of music. What do you think am I?

What goes up and doesn’t come back down?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

It is just something that everybody does at the same time. What is that?

What has a ring but no finger?

I have keys but no locks. I have a space but no room. You can enter, but can't go outside. What am I?

Where can you find rivers with no water, cities with no buildings and forests with no trees?

What has one head, one foot and four legs?