Answer:
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
What is easy to get into but hard to get out of?
I welcome the day with a show of light. I steathily came here in the night. I bathe the earthy stuff at dawn but by noon, I'm gone. What am I?
I tremble at each breath of air and yet can heaviest burdens bear.
The more of this there is the less you see. What is it?
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.