Inertia formative

A force is a _______ or a _________.
The _____________ (paper /bottle) has MORE mass.
What force is currently acting on the paper?
What force is acting on the bottle?
In this part 1 investigation, what stayed "at rest"?
In this Part 1 investigation, what item had a change in its motion - went from rest to moving ? There are more than one answer here.