Answer:
What can be measured but not seen?
A nut cracker up in a tree.
Long and slinky like a trout, never sings till it's guts come out.
What is lighter than what it is made of?
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
Why did the stadium get so hot after the game?