Weathering, Erosion And Deposition: MCQ Quiz

Explanation
Riprap involves placing large stones or boulders along shorelines, riverbanks, or slopes to protect against erosion caused by the flow of water. The stones absorb and deflect the energy of waves, tides, or currents, thereby reducing the impact on the soil and preventing it from being washed away. This method is commonly used in areas prone to water erosion, such as along rivers and coastal regions, to stabilize the soil and prevent land degradation.

Explanation
The statement is true because gradient, stream channel shape, and discharge are indeed three factors that affect stream valley. Gradient refers to the slope or steepness of the land, which determines the speed and force of the water flow. Stream channel shape refers to the physical characteristics of the stream channel, such as its width, depth, and curvature, which influence the flow and erosion patterns. Discharge refers to the volume of water flowing through the stream, which can vary depending on factors such as rainfall and tributaries. These three factors play a significant role in shaping and determining the characteristics of stream valleys.

Explanation
Water can combine with minerals to form clay through a process called weathering. Weathering occurs when water interacts with rocks and minerals, causing them to break down and form new compounds. In the case of clay formation, water can dissolve minerals such as feldspar and mica, and then deposit them in a new location where they can recombine and form clay minerals. This process can take place over long periods of time and is influenced by factors such as temperature, pressure, and the presence of other substances. Therefore, it is true that water can combine with minerals to form clay.

Explanation
The agents of deposition and agents of erosion are the same because they both involve the movement and transportation of sediment. Agents of deposition, such as rivers and wind, carry sediment and deposit it in new locations, while agents of erosion, such as water and glaciers, wear away and remove sediment from one area and transport it elsewhere. Therefore, the processes of deposition and erosion are interconnected and often occur simultaneously, making the statement true.

Explanation
The statement "Does the Sorting depend on the velocity?" is asking whether the process of sorting depends on velocity. The correct answer is True, meaning that sorting does indeed depend on velocity. This suggests that the speed or rate at which sorting occurs is a factor that influences the process. The explanation for this answer could be that the efficiency and effectiveness of sorting can be affected by the velocity at which items are being sorted. Faster velocity may lead to quicker and more accurate sorting, while slower velocity may result in delays or errors in the sorting process.

Explanation
The correct answer is "same" because agents of deposition and erosion refer to the same processes and forces that shape the Earth's surface. These agents can include wind, ice, gravity, and water, among others. They all contribute to the movement and deposition of sediment, as well as the erosion of landforms. Therefore, the answer "same" accurately reflects the relationship between agents of deposition and erosion.

Explanation
Moving ice, wind, and gravity are all agents of abrasion. Abrasion refers to the process of wearing down or eroding surfaces through the mechanical action of these agents. Moving ice can carry rocks and sediments, scraping and grinding against surfaces as it moves. Wind can transport sand and other particles, causing them to impact and erode surfaces over time. Gravity plays a role in the movement of materials, causing them to slide or roll downhill and contribute to abrasion. Therefore, all of the options listed (moving ice, wind, and gravity) are correct as agents of abrasion.

Explanation
Meanders: The velocity changes in the S- Shaped curves!
Fastest on the outside and slowest

Explanation
Terracing is an agricultural method used to prevent soil erosion on hilly or mountainous terrain. It involves creating a series of flat, stepped levels on a slope, which helps to slow down water runoff and reduce soil erosion. By breaking the slope into smaller sections, terraces allow water to infiltrate the soil rather than washing it away. This method is particularly effective in regions with steep slopes where traditional farming methods might lead to significant soil loss.

Explanation
Erosion is the process by which weathered materials, such as soil, rock particles, and sediments, are transported from one location to another. This movement is driven by natural forces such as water, wind, ice, and gravity. For example, rivers can carry sediments downstream, wind can transport sand across deserts, and glaciers can move large boulders over long distances. Erosion is a key process in reshaping the Earth's surface, leading to the formation of valleys, canyons, and other landforms.