How do waterfalls start?

The most common way for waterfalls to start is through erosion. When water flows over a rock surface, it slowly wears away the rock. This process, called erosion, can create a channel in the rock. As the channel becomes deeper, the water flow increases, which further speeds up the erosion process. Eventually, the channel may become so deep that the water plunges over the edge, creating a waterfall.

2. Faulting

Waterfalls can also be formed when a fault line occurs in the Earth's crust. A fault line is a break in the Earth's surface where two tectonic plates are moving away from each other. When a fault line occurs, it can create a steep cliff. If water flows over this cliff, it can create a waterfall.

3. Glaciers

Glaciers can also create waterfalls. When a glacier retreats, it can leave behind a deep valley. If water flows into this valley, it can create a waterfall.

4. Volcanic activity

Volcanic activity can also create waterfalls. When lava flows from a volcano, it can create a new landform. If this landform is steep, it can create a waterfall.

5. Human activity

In some cases, waterfalls can be created by human activity. For example, a dam can be built to block a river, which can create a waterfall.