Answer:
It increases and decreases yet no one see it. It is not a fire and yet it can be quenched.
Why do all kids want to be astronauts?
Why was the leader of al-qaeda moody, frustrated, angry and easily annoyed?
Why do plants hate math?
In what room a ghost cannot enter?
What made Cyclops quit teaching?
Funny
Animal
Difficult
Easy
Food
Kids
Logic
What am I?