Answer:
I am between earth and heaven. What am I?
I am milky white and scares people.
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
I wear a green jacket on the outside white jacket as a second layer and red jacket inside. I am pregnant with a lot of babies. (one word)
I have no bed to sleep and no palace to live. I don't have a single coin but I am known as king. What am I?
I tell people to be careful when handling boxes.