Hidden numbers, only counted with each delicious bite, Fuel for life's ceaseless motions, in the day or night. A unit of measurement, though difficult to keep in sight Each gives you energy, regardless if taken in misery or delight

I exist only when you stop looking at me directly. I am born from agreement, but I collapse under proof. I can control crowds without force, erase truth without lies and survive centuries without a body. I am not a word but I live inside words.

Each clue below points to a different four letter word. All four words use the same letters. All answers accepted: Skin torch Keep open? Sit it down. Recent tour?

Airline. Change. River. Slope. Triangle. Discriminant. Particle. Is it just me, or am I starting to sound Greek?

It starts with a thought. There's a cat in me. Put a particle, and it dies. Or so you think. You can't see it, but the states... there are two, both at once. I'll ask you this one time... what am I?