12 Questions
What is a characteristic of the Philippines' terrain that makes it prone to landslides?
Mountainous
What is the main reason landslides do not occur on flat ground?
angle of the ground
What is another name for a landslide?
Mudslide or debris avalanche
What is the difference between a landslide and a sinkhole?
Their composition and type of terrain
Why has the expansion and development of cities led to an increase in geological hazards?
Because of the increased impact and damage due to geological hazards
What is the term used to describe natural phenomena that cause major problems around the world?
Geological hazards
What role does water play in land erosion?
It is a natural agent for erosion
What type of landslide is characterized by a slow downslope movement of particles?
Soil creep landslide
What is a common consequence of building structures on steep-slope mountains during heavy rains?
Landslide hazards increase
What is the primary reason why areas with dense population and denuded terrain are more susceptible to landslide hazards?
Because of the lack of vegetation
What type of landslide is characterized by a sudden slide caused by heavy rain?
Rock fall landslide
What is the term for the abrupt drop-off at the top of a landslide?
Scarp
Study Notes
Location and Geology of the Philippines
- The Philippines is located in an archipelago characterized by mountainous terrains and is prone to typhoons that bring heavy rain.
- The combination of these two conditions can cause landslides and sinkholes due to the topographic and geologic composition of the land.
Geological Hazards
- Geological hazards are natural phenomena that cause major problems worldwide.
- The expansion and development of cities have increased the impact and damage due to geological hazards.
- Most geological hazards are related to natural conditions, but some may be due to human activities.
Landslides
- Landslides are also known as mudslides or debris avalanches and occur on inclined terrain.
- Landslides are ground movements on sloping terrain and do not occur on flat ground.
- Gravity induces the land to move downward, and rain can aggravate this process.
- Structures built on steep-slope mountains have a high vulnerability to landslide hazards, especially during heavy rains.
- Areas with steep slopes, dense population, and denuded terrain are highly susceptible to rainfall-induced landslide hazards.
Types of Landslides
- Soil Creep Landslide: a very slow downslope movement of particles that occurs in every slope covered with loose, weathered material.
- Slumping Landslide: a downward movement of rock debris as a unit, usually along a curved plane of failure.
- Debris Flow Landslide: a landslide of water-soaked mass of rock and soil that slides down the slope.
- Rock Fall Landslide: a sudden slide caused by heavy rain, where the rock on the slope loosens and then slides down the slope.
Sinkholes
- Sinkholes can occur on elevated or flat surfaces and can range from massive to barely noticeable.
- Sinkholes can leave a dent, a hole, or a body of water on the ground.
- The actual difference between landslide and sinkholes is in their composition and type of terrain.
Explore the geologic hazards that affect the Philippines, including landslides and sinkholes, and how they are influenced by the country's terrain and weather patterns. This quiz delves into the types and characteristics of these hazards and their impact on the environment. Test your knowledge of geologic hazards and their effects.
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