Answer:
It's got twists and turns, but has no curves. Twist it to fix it, turn it to ruin it. What is it?
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
I know a word of letters three. Add two, and fewer there will be!
Looks like water, but it's heat. Sits on sand, lays on concrete. A play on the eyes, but it's all lies.
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?