Answer:
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iām gone.
I can go through glass without breaking it. What am I?
I am black when you buy me, red when you use me. When I turn white, you know it's time to throw me away. What am I?
I am between earth and heaven. What am I?
I fill a room but take no space.
The answer I give is yes, but what I mean is no. What was the question?