North Carolina Landslides

Question

Scientists often study the location and frequencies of natural disasters throughout a region. In North Carolina, scientists have studied the location and frequencies of landslides because they are one of the most common natural hazards in the area. Scientists are currently investigating the causes of landslides and the geological impact they have on the region. They have done a lot of studies on how the amount of rainfall in the region has caused landslides to occur.

Khalil and his family are moving to North Carolina and recently learned about the work of the scientists. They are looking at homes throughout the region. In their search for a new home, they want to consider when and how often landslides have occurred before making a final decision. Khalil and his family analyze data from the scientists. Through his research, he found out the the British define a mountain as a “hill that is over 1000 feet high.”

Constructed Response Question
After reviewing all of the scientist’s data, Khalil makes the following claim: “The role of water in Earth’s geological processes contribute to the formation of landslides in North Carolina.” Do you agree or disagree with Khalil’s claim? Support your reasoning.
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Answer 1

I agree with Khalil's claim that the role of water in Earth's geological processes contributes to the formation of landslides in North Carolina.

There are several reasons to support this assertion:

1. Soil Saturation: Landslides often occur when soil becomes saturated with water. In North Carolina, the region experiences significant rainfall that can lead to saturated soils. When the soil's pore spaces fill with water, it reduces the cohesion between soil particles. This decrease in cohesion can make the soil more prone to sliding down slopes, especially in hilly or mountainous areas.

2. Increased Weight: The addition of water adds weight to the soil and rock on slopes, which can lead to instability. The more saturated the soil becomes, the heavier it is, and this increased load can exceed the strength of the materials, prompting a landslide.

3. Weathering Processes: Water plays a crucial role in weathering, the process where rocks break down into smaller particles. In North Carolina, the presence of moisture can accelerate the weathering of rocks and soil, weakening the structure and making it easier for landslides to occur.

4. Hydrological Cycle: The hydrological cycle includes processes such as precipitation, evaporation, and infiltration. In areas where heavy rain or rapid snowmelt occurs, the volume of water that infiltrates the ground can lead to rapid changes in the stability of slopes, further contributing to the likelihood of landslides.

5. Historical Data: Studies conducted by scientists in the region have shown correlations between heavy rainfall events and the occurrence of landslides in North Carolina. These historical data findings imply that weather patterns, particularly those that lead to heavy rainfall, have a direct impact on landslide frequency and severity.

In conclusion, the evidence indicates that water significantly influences geological processes in North Carolina, contributing to the risk of landslides. Therefore, Khalil's understanding of the relationship between water and landslide formation is well-founded and justified.