Answer:
I am a five letter word. If you remove my first letter I am a form of energy. Remove my first two and I am needed to live. Scramble the last three and you can drink me. What am I?
Taken from a mine and then locked up in a wooden case. I am used by students everyday.
You can never eat me for breakfast or lunch. What am I?
Why is leather armor best for sneaking?
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
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.