Science Fun Riddles

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Across
  1. 2. I’m as hard as stone but can be found on the body. What am I?
  2. 4. Born in the ocean and white as snow.When I fall back to water I disappear without a trace.What am I?
  3. 6. Many have heard me, but nobody has seen me. I don’t speak back unless spoken to. What am I?
  4. 9. When the son of the water returns to the parent, it dies. What is it?
  5. 11. You’ll find me in the sky, often very bright,Sometimes I’m round, other times a small sight,I’m not the sun, but I shine during the night,Can you guess my name right?
  6. 12. What gets wet while drying?
  7. 14. The alphabet goes from A to Z, but I go Z to A
  8. 15. Give it food and it will live;give it water and it will die.What is it?
Down
  1. 1. I'm in the air you breathe, in water, and in rust; life's essential, in me you must trust. What am I?
  2. 3. If you put your eye to this, you can see far.It helps you spot planets, the moon, and even stars.What is it?
  3. 5. I’m black when you get it,Red when you burn it,Gray when you’re done with it.What am I?
  4. 7. I'm tall when I'm young and I'm short when I'm old.What am I?
  5. 8. What are ten things you can always count on?
  6. 10. I live upside down, and on Halloween, I will give you a big surprise. I see with my ears and not my eyes.
  7. 13. I’m pronounced as one letter, written with three,I come in blue, brown, black or gray,Reverse me, and I read the same way.What am I?