Question 14

Glacial ice as it advances

Glacial ice can transport the largest particles as it moves, primarily due to its immense mass and the grinding action it exerts on the landscape. This process allows glaciers to carry large rocks and debris over significant distances.

A) Glacial ice as it advances

This option is correct because glaciers have the capacity to transport large boulders and sediment as they flow. The weight and pressure of the ice facilitate the movement of substantial geological materials, making glaciers one of the most powerful agents of erosion and transportation in nature.

B) Steadily flowing water in a stream

While steadily flowing water can transport sediments, it is generally limited to smaller particles such as sand, silt, and clay. The capacity of water to carry larger particles decreases with flow velocity, making streams less effective than glaciers in transporting large materials.

C) The wind

Wind is capable of moving smaller particles, particularly dust and sand, but it lacks the strength to transport larger rocks or boulders. The efficiency of wind in sediment transport diminishes significantly with increasing particle size, making it an inadequate choice for transporting large particles.

D) Ocean waves on a sandy beach

Ocean waves can move sand and smaller debris along the shoreline but are not designed to transport larger particles like rocks. The action of waves is more effective at shifting finer materials, and while they can move some larger items, they do not have the same capability as glacial ice.

Conclusion

Glacial ice stands out as the most effective transport mechanism for large particles due to its ability to carry substantial geological materials over vast distances. In contrast, the other options—stream water, wind, and ocean waves—are limited to smaller particles, making them less effective for transporting larger materials. This distinction highlights the unique role of glaciers in shaping landscapes through their powerful transport capabilities.