Understanding Landslides

The video explains how landslides occur when gravity overcomes friction, causing rock layers to slide. It discusses various causes such as heavy rain, deforestation, and earthquakes. The video also covers slow landslides that destabilize buildings over time and coastal erosion leading to rockfalls. Methods to stabilize slopes, like using metal bolts, are also mentioned.

What is the primary force that causes landslides?

• Wind

• Gravity

• Magnetism

• Electricity

How does heavy rain contribute to landslides?

• By drying out the soil

• By adding weight and acting as a lubricant

• By causing earthquakes

• By freezing the ground

What role do tree roots play in preventing landslides?

• They hold the land in place

• They absorb all the water

• They attract wildlife

• They increase soil acidity

How can earthquakes trigger landslides?

• By causing the ground to freeze

• By increasing the temperature

• By reducing air pressure

• By shaking the upper layers of rock loose

What method can be used to stabilize unstable ground?

• Drilling long metal bolts into the bedrock

• Using sandbags

• Building taller structures

• Planting more trees

What is a characteristic of slow-moving landslides?

• They happen overnight

• They make buildings unstable over many years

• They are caused by volcanic eruptions

• They only occur in deserts

What natural process causes rockfalls due to coastal erosion?

• Volcanic eruptions

• Tidal waves

• Glacial movement

• Ocean waves wearing away cliff rock

What happens when the weight of an overhang exceeds the rock's strength?

• It turns into a cave

• It forms a new cliff

• It collapses

• It becomes a tourist attraction

Which of the following is NOT a cause of landslides?

• Deforestation

• Earthquakes

• Heavy rain

• Solar flares