Q3 - (1st) POSITIVE & NEGATIVE EFFECTS OF WEATHERING & SOIL.pptx

Grade 5

1. POSITIVE & NEGATIVE EFFECTS OF WEATHERING & SOIL EROSION

2. Landslide is a geological phenomenon in which rocks fall, and debris or rocks move in a downslope movement. Its major driving force is gravity. However, precipitation, earthquakes, volcanic eruptions, land instability, as well as weathering of rocks and soil erosion, are also factors that cause landslides. They usually happen in terrain areas.

3. Landslide is different from soil erosion. Soil erosion happens in different landforms. It is the movement of soil from one location to another, usually through wind or water. Landslide is one of the phenomena that result from weathering and soil erosion.

4. The occurrence of weathering and soil erosion has major impacts not only to the environment but to living things as well. However, it is important to remember that these phenomena have both positive and negative effects to humans and the environment.

5. Positive Effects of Weathering and Soil Erosion Weathering and soil erosion are processes that shape the earth’s surface. Aside from this, they can positively affect the living things and the environment in some ways. The following are some of the positive effects of weathering and soil erosion.

6. The weathering of rocks helps in the formation of soil. Soil is essential for sustaining life on earth. Many microorganisms thrive in soil. Without it, plants would not be able to grow to feed humans and animals. Weathering is a significant part of soil formation. As rocks break down physically, biologically, or chemically during weathering, more soil is produced for living things to make use of. Positive Effects of Weathering and Soil Erosion

7. 2. Weathering creates different types of materials. Through weathering, clay, sand and gravel can be produced. These materials are important to the plant life on earth. These materials are important to the plant life on earth, but they are also relevant to humans as they are usually used in the construction of houses, buildings, bridges, roads, and other infrastructure. Positive Effects of Weathering and Soil Erosion

8. 3. Weathering provides access to some minerals. Phosphorus, calcium, magnesium, and iron are essential minerals found on earth. Rocks and other geological materials are often filled with these minerals, but they are not easily accessible to living things. However, as rocks break down over centuries and turn into dust due to weathering, plants and small animals are able to extract these minerals from tiny dirt particles. Positive Effects of Weathering and Soil Erosion

9. 4. Soil erosion can wash away parasites in crops and other bad chemicals that can harm the vegetation in a certain area. Since soil erosion displaces the topsoil and rock particles that are broken down, it can also wash away parasites along with them. Through soil erosion, harmful chemicals that can hamper the vegetation in a certain area are washed away too. This aids farmers in improving their crops because healthy soil is one of the most important factors in order to have a bountiful harvest. Positive Effects of Weathering and Soil Erosion

10. 5. Soil erosion and weathering can result to new landscapes. Due to weathering and soil erosion, rocks are broken down and the small particles are washed away to a different location. This can result to the formation of new landscapes that can be natural treasures of the country. Positive Effects of Weathering and Soil Erosion

11. Negative Effects of Weathering and Soil Erosion Despite their positive effects to living things and the environment, weathering and soil erosion can also cause negative impacts to the earth.

12. 1. Weathering and soil erosion can result to the loss of soil fertility. When soil erosion occurs either through water or wind. It removes the topsoil part where most nutrients are stored. Thus, the capacity of the soil to hold nutrients is reduced. This poses a great threat to farmers and the farming industry in general. Negative Effects of Weathering and Soil Erosion

13. 2. Weathering and soil erosion can cause some microorganisms and other small animals to lose their natural habitat. As some life forms live in rocks and soil, they can be greatly affected once soil erosion causes these rock particles and soil to be washed away. They can be brought to a new location that is not suitable to them. These living things can lose their life during transport too. Negative Effects of Weathering and Soil Erosion

14. 3. Soil erosion can cause landslides. A stable slope can be unstable once soil erosion occurs. This can result to landslides in the area. Landslides can cause damage to properties and destroy different forms of living things. Negative Effects of Weathering and Soil Erosion

15. 4. In chemical weathering, the acidic rainwater can cause damages in some structures that are composed of limestones. Limestones are made up of sodium carbonate, which is reactive to acidic substances. When the chemicals combine, it leads to the formation of carbon dioxide. When limestone is mixed with acid rain, it can lead to the corrosion of the material. Negative Effects of Weathering and Soil Erosion

16. 5. Soil erosion can cause water and air pollution. The soil which erodes can clog the waterways and settle inti rivers, lakes, and streams. The soil washed away during soil erosion may include harmful chemicals and parasites. Thus, when the soil reaches the bodies of water, marine organisms can be greatly affected and water pollution will occur. On the other hand, the soil particles carried in the air lead to dust. This can be inhaled by both humans and animal, which often leads to respiratory problems and skin infections. Negative Effects of Weathering and Soil Erosion