Answer:
Until I am measured I am not known, Yet how you miss me when I have flown.
What kind of nut is empty at the center and has no shell.
Who eats a lot of iron without getting sick?
If all Wibbles are Criggles, all Borkins are Kwumblins, no Hoggles are Borkins, and all Criggles are Borkins, is it true that all Borkins are Criggles?
My first is a body of water. My second is me. My third came before. My fourth before all three. My fifth sounds like my first. My sixth is in a lake. Put all six together to make an animal that will keep you awake.
The warmer I am the fresher I am.