Answer:
What comes in many different sizes but is always only 1 foot long?
I break down buildings, I crumble mountains but you can't see me. What am I?
The more you add the less it weighs. What is it?
A caribbean shape that makes ships disappear.
You can see me in water, but I never get wet. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?