DRRR 4th Quarter Exam

What refers to the mass movement of rock, soil, and debris down a slope due to gravity?

• Earthquake

• Flood

• Landslide

• Sinkhole

Student B observes a region where rockfall and debris mix with water and forms a slide that can travel considerable distances. What geologic phenomenon does student B observe?

• Creep

• Debris flow

• Mudslide

• Slump

If you were the geologist assigned to investigate how each type of land subsidence occurs, what type of landslide would you classify when evidence shows that soil travels short distances at speeds ranging from rapid to very rapid, with minimal damage likely to the topmost vegetation of the slope?

• Creep

• Debris slide

• Rockfall

• Slump

Differentiate dissolution sinkholes and cover-collapse sinkholes.

• Dissolution sinkhole form in areas where the bedrock is made of soluble rock such as limestone, gypsum, or salt, whereas cover-collapse sinkholes form suddenly as the soil over a soluble rock layer collapse into underground cavities.

• Dissolution sinkhole forms when water gradually dissolves the soluble rock, creating underground cavities, while cover-collapse sinkholes typically occur in areas where the soluble rock is covered by a layer of non-soluble material such as clay or sand.

• Both A and B

• None of the above

What type of landslide in which the soil is involved and can travel short distances and vary from rapid to very rapid?

• Creep

• Debris flow

• Mudslide

• Slump

Landslides can cause risk on both living and non-living things occupying in a particular landscape. Which of the following results BEST describes its effects to the physical aspects of an area?

• Landslides can result to loss of timbers, agricultural crops, and fish stocks.

• Landslides can be unpredictable sometimes and can result to loss of lives of people and animals living in the upland areas.

• Landslides can result to the change of land topography, altering its original features and functions, which affects the environment.

• Landslides can destroy wildlife and the local ecosystem, affecting keystone species and biodiversity, which leads to ecological imbalances.

Landslides can be grouped based on the materials involved in the mass movement and its velocity. What geological movement is implied when trees, fences and electrical post on the areas tend to lean or tilt to the downward direction of the slope?

• Creep

• Debris flow

• Mudslide

• Slump

Geological hazards are caused by activities taking place in the Earth’s interior and on the surface. Based on their characteristics, how can you distinguish debris slide from rockfall?

• Debris slide contains soil and water whereas rockfall contains soil.

• Debris slide contains dry soil while rockfall contains boulders and water.

• Debris slide contains soil and rocks while rockfall contains soil and water.

• Debris slide contains rocks and water, while rockfall contains rocks and dry soil.

These are specialized maps that identify areas where natural geological processes, such as landslides, and other geo-related hazards, are likely to occur. These maps are created using geological, geophysical, and geotechnical data, as well as historical records of past events.

• Volcano Hazard Maps

• Landslide Hazard Maps

• Geological Hazard Maps

• Earthquake Hazard Maps

What does MGB stand for?

• Mineral Geology Bureau

• Miners’ Geological Bureau

• Mining and Geometry Bureau

• Miners and Geosciences Bureau