Short easy simple riddles for teens

What do you call a cat crossed with a fish?

What time of day, when written in a capital letters, is the same forwards, backwards and upside down?

Each morning I appear to lie at your feet. All day I will follow no matter how fast you run, yet I nearly perish in the midday sun.

My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.

Born of water, I drown in water. A blood-thirsty beast you can barely see. What am I?

What body part is pronounced as one letter but written with three, only two different letters are used?

A girl was ten on her last birthday, and will be twelve on her next birthday. How is this possible?

I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty.

Feed me and I live, yet give me a drink and I die.

What is it that has hands, yet is unable to clap?