Question

Give two ways to prove that liquids, like water, are matter. (AKA "How are liquids, like water, are/is matter?"; "How is liquid a state of matter?")

The questions mean the same thing. I just put it there so some people won't get confused.

Answer 1

Liquids will flow and fill the lowest portion of a container, taking on the shape of the container but not changing in volume. The limited amount of space between particles means that liquids have only very limited compressibility.