water will always act due to the forces of gravity, not necessarily stay "level." It's why when you have instances of zero gravity (such as in the infamous "vomit comet" plane ride used to train astronauts), you'll see water float.
I mean...hold a glass of water up and pour it out. Where does it go? Downward. That's the pull of gravity. There aren't any natural situations where this doesn't happen. Water will flow downward as gravity pulls it. I'm genuinely not sure what situations are where water isn't acting in this way.
water will always act due to the forces of gravity, not necessarily stay "level." It's why when you have instances of zero gravity (such as in the infamous "vomit comet" plane ride used to train astronauts), you'll see water float.
What kind of proof would you need?
I mean...hold a glass of water up and pour it out. Where does it go? Downward. That's the pull of gravity. There aren't any natural situations where this doesn't happen. Water will flow downward as gravity pulls it. I'm genuinely not sure what situations are where water isn't acting in this way.