Quiz #1 – Episode One

Hello there, Oliver Pruitt here.
This first question is more of a riddle for you to solve, and it can be found in Episode 1 of The Unexplainable Disappearance of Mars Patel: Code Red.
Good luck thinking it through. When you’ve solved it, you’ll get a very special treat—one of Mars Patel’s favorites.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter.