Of course not, there is gravity on earth.
a waterfall <><><> A river
The river does not flow upwards. The Earth is round, the Nile simply flows South to North - on a map it just looks like it flows "upward"
It's a liquid.
None. An 'upward falling waterfall' is a contradiction in terms.As the name indicates, waterfalls consists of water falling to a lower level. Water, nor any other object for that matter, can never 'fall upwards'.If you have seen one nevertheless, it is most likely either an illusion or some kind of trick.
A waterfall.
A waterfall is created when a stream flows over erosion resistant rock that ends in a sudden drop or falling away.
In the context of a waterfall, the term "cascade" refers to a series of small, steep steps or stages that the water flows over as it descends down the waterfall.
Niagara Falls --- IS --- a cliff.... that's what makes a waterfall. A waterfall is a place where water flows over the edge of a cliff.
Due to capillarity, oil flows upward in the lantern. The attraction of liquid molecules in the oil between each other and with the wick is known as capillarity.
Upward communication is the natural direction that information flows in an organized structure from the bottom to the top with no or little message distortion.
It could become a waterfall. Or if it just flows over onto more land then it becomes a river, not a stream.
The Victoria Falls