Riddles!

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Across
  1. 3. I am tall when I am young and short when I am old. What am I?
  2. 4. If you lose me, there’s a good chance you will make other people lose me as well. What am I?
  3. 5. I have hands, but I cannot clap. What am I?
  4. 6. I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?
  5. 7. I sound like one letter, but written with three. I show you everything when you look through me. What am I?
Down
  1. 1. I can be long or I can be short. I can be bought or I can be grown. I can be painted or I can be bare, I can be round or I can be square. What am I?
  2. 2. I may have eyes, but I don’t use them to see. I’m kept in the dark until you need me, what am I?
  3. 3. I have a lot of teeth, but I cannot bite. I’m used often during the day, but rarely at night. What am I?