Mass Movement and Soil Dynamics

This tutorial provides a summary of mass movement, explaining its definition, factors affecting it, and types, including slow (soil creep) and fast (bog burst) movements. It highlights the importance of understanding these concepts for exams, particularly focusing on soil creep as a common exam topic.

What is the term used for the loose material that moves down a slope under gravity?

• Sediment

• Regolith

• Debris

• Gravel

Which factor increases the likelihood of mass movement on a slope?

• Low water content

• Dense vegetation

• Flat terrain

• Steep gradient

How does human activity contribute to mass movement?

• By stabilizing slopes

• By reducing water content

• By planting trees

• By cutting into hills

What role do tree roots play in mass movement?

• They destabilize the soil

• They cause landslides

• They increase water content

• They help hold the soil together

Which type of mass movement is the slowest?

• Bog burst

• Soil creep

• Landslide

• Mudflow

Which of the following is NOT a fast type of mass movement?

• Mudflow

• Landslide

• Soil creep

• Bog burst

What is a characteristic sign of soil creep?

• Saturated soil

• Sudden landslides

• Tilted trees and poles

• Rapid downhill movement

What natural process can contribute to soil creep?

• Tidal waves

• Volcanic activity

• Earthquakes

• Freeze-thaw action

What happens to a bog during a bog burst?

• It evaporates

• It solidifies

• It becomes saturated and moves

• It dries up

Where is bog burst commonly observed?

• Deserts

• Mountains

• Urban areas

• Derrybrien, County Galway