Answer:
In the video, the sandcastle represents the surface of the Earth, which is made up of different types of rocks. The sandcastle is exposed to different environmental factors, such as wind and water, which represent weathering and erosion, respectively. As the waves crash onto the sandcastle, the water breaks down the sand particles and carries them away, which is similar to how erosion works in nature.
As the waves recede, they deposit the sand particles on a new location, creating a new surface. This is an example of deposition, which can be observed in nature when sediment is deposited by water, wind, or glaciers.
The sandcastle also demonstrates how the forces of weathering, erosion, and deposition can change the shape of the Earth's surface over time. This process is known as geomorphology, and it involves the gradual transformation of the Earth's surface through natural processes.
Overall, the sandcastle in the video provides a simplified model of the complex processes of weathering, erosion, and deposition that shape the Earth's surface over time.