the water is not cold and air hits it
Generally liquid. Though some do freeze
Yes and no. The waterfall itself does not freeze over. But with a prolonged freeze, an "ice bridge" may form in the river (below, I think).
well climate affects waterfalls because if the temperature of a region was too cold the waterfalls would eventually freeze and turn into glaciers
a waterfall.
Erosion and Freeze Thaw will steadily move the Waterfall backwards, although there are things in place to slow this process.
Khone
you have to get the HM waterfall to go over the waterfall
you use waterfall at the Pokemon waterfall or the battlefield.
a waterfall
there is a hm called waterfall
It's easy. all you have to do is go to waterfall pond, silver trench, grand sea, faraway sea. water field and mt. freeze.
When using Surf outside of battle, and if there is a waterfall and you are at the bottom, you can travel up the waterfall by using Waterfall.