Answer:
I am useless when together but useful when I am broken apart. What am I?
You turn me over after you have travelled far.
I am a busy worker who is a water mammal.
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes. What am I?
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. 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.