What's not alive but can die?

What has an eye but can not see?

What is the only question you can't answer yes too?

What has many keys but can't open a single lock?

What has a bottom at the top?

What is black when it's clean and white when it's dirty?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

What has legs but doesn't walk?

Who has 13 hearts but no organs?

What's the only room from which no one can enter or leave?

What has teeth but Cannot bite?

What can run but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps.