Answer:
What gets bigger when more is taken away?
Lighter than feather and softer than silk, yet the strongest man in the world cannot hold me for more than a few minutes. What am I?
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
I am a mother from a family of eight. I spin around all day despite my weight. Had a ninth sibling before founding out it was fake. What am I?
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
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.