Mass Movement video

What is the primary force responsible for mass movement?

• Wind

• Water erosion

• Gravity

• Tectonic shifts

What term describes the loose surface material that moves during mass movement?

• Bedrock

• Sediment

• Regolith

• Alluvium

How does water, typically in the form of rainfall, influence mass movement?

• It solidifies the soil

• It makes the regolith heavier and more unstable

• It creates new landforms

• It reduces the slope's gradient

Which human activity can contribute to mass movement by undercutting a slope?

• Planting trees

• Building roads and railway lines

• Terracing for agriculture

• Constructing dams

How does vegetation help prevent mass movement?

• It absorbs sunlight

• It increases the slope's gradient

• Its roots bind the soil together

• It adds weight to the slope

What is the typical rate of movement for soil creep?

• Several meters per day

• 1-2 centimeters per year

• 10-20 meters per hour

• Several kilometers per month

Which of the following is a visible sign of soil creep over time?

• Straight tree trunks

• Upright telegraph poles

• Collapsed fences

• Smooth, undisturbed walls

Why might the lower trunk of a tree bend due to soil creep, while the upper part grows straight?

• To absorb more water

• To avoid strong winds

• To maximize sunlight received

• To provide better anchorage

What combination of factors can lead to a landslide?

• High temperatures and strong winds

• Removal of vegetation and undercutting of slopes

• Low rainfall and flat terrain

• Increased soil stability and dense vegetation

Mudflows are most likely to occur in areas with which characteristics?

• Low rainfall, flat terrain, and dense vegetation

• High rainfall, steep slopes, and removed vegetation

• Moderate rainfall, gentle slopes, and stable soil

• Arid climate, rocky terrain, and sparse vegetation