Short what am I riddles for teens

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

I have lot of memories, but I own nothing. What am I?

I hiss. I can be poisonous. I am long. I have a forked tongue. What am I?

I have no life, but I can die, what am I?

I have seas without water. I have forests without wood. I have deserts without sand. I have houses with no brick. What am I?

I'm tall when I'm young and I'm short when I'm old. What am I?

What has one head, one foot and four legs?

When you have me, you feel like sharing me. But, if you do share me, you don't have me. What am i?

I sleep when you are awake, I am awake when you fall asleep. I can fly but no feathers to aid my flight. What am I?

I can be as thin as a picture frame but my insides have many things you can see. What am I?