Answer:
I am an instrument you can hear but cannot touch or see. What am I?
By Moon or by Sun I shall be found. Yet I am undone if there's no light around.
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
Lives in winter, dies in summer, and grows with its roots upward. What is it?
If you're looking for something sweet I know what to do. But if you don't like heat I'm not for you.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.