Question

1 mass movements(continued)
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1. organize the following types of mass movements in order of increasing speed: slide, creep, flow, and rockfall
2. identify the underlying force behind all forms of mass movement
3. analyze how water affects mass movements. use two examples of mass movement in your analysis.
4. appraise the effects of one type of mass movement on humans.

Explanation:

1. Creep is a very slow - moving mass movement. Slide is faster than creep as it involves a more sudden movement of a mass along a surface. Flow involves the movement of a mass like a fluid and is faster than slide. Rockfall is the fastest as rocks fall freely under the influence of gravity.
2. Gravity is the force that pulls masses down slopes, driving all forms of mass movement.
3. For example, in a mudflow, water mixes with soil and debris, reducing friction and allowing the mass to flow more easily. In a landslide, excess water can saturate the soil, increasing its weight and reducing cohesion, making the slide more likely to occur.
4. For instance, a landslide can destroy homes, infrastructure, and disrupt human settlements. It can also block roads and rivers, causing economic losses and endangering human lives.

Answer:

1. Creep, slide, flow, rockfall
2. Gravity
3. Mudflow: water reduces friction; Landslide: water increases weight and reduces cohesion
4. Landslide can destroy homes and infrastructure