Answer:
I begin your sentences.
Lighter than what I am made of, more of me is hidden than is seen. What am I?
I have six faces but not even one body connected 21 eyes in total but cannot see.
I go up and down at the same time. Up towards to sky and down towards the ground. What am I?
Sometimes I am white, sometimes I am dark. Most people love me. 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.