Answer:
You heard me before and then again. Afterward I die until you call me again.
As a state in the USA, I am round on both sides and high in the middle. What am I?
I am all around, yet to me you are half blind. Sunlight makes me invisible and difficult to find. What am I?
Lovely and round I shine with pale light grown in the darkness a lady's delight.
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?