Moving water forms a valley be eroding the soil underneath it. As the water moves across the soil it takes some with it, this can form a valley over millions of years.
erosion
The glacier will melt eventually, and then form a valley, as well as water flowing through that valley; and it may even help form new valleys.
When the glacier is moving down the side of the valley it scrapes of the rocks. The grinding changes the shape of the valley so that it is rounded.
a canyon
Water typically flows faster moving down a mountain due to the steep gradient, while it may slow down when moving through a valley due to the more level terrain. The speed of water flow also depends on other factors such as the volume of water, obstacles in its path, and the width of the channel.
Tide. Tides are masses of moving water. The moons gravitational pull causes the form of a wave to occur.
They form when heavy eroded particles settle out of moving water.
An avalanche is a mixture of loose sand, rock, and water (usually in the form of snow) moving at a rapid pace.
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form the sand & water moving it
A canyon is most likely formed by fast moving water, as it can quickly erode and carve out the land over time due to the force and speed of the water flow.
Streams are formed when water cuts through the ground. This water wears away a path which then turns into a stream.