Hello, young learners! Welcome back to Primary 5 Basic Science and Technology. In our previous lesson, we learned about No previous lesson found.. Today, we’re going to learn about ENVIRONMENTAL CHANGES.
Objectives
By the end of this lesson, you should be able to:
- Define erosion.
- Identify pictures of erosion.
- List 5 causes of erosion.
Erosion & Causes of Erosion
What is Erosion?
Erosion is the process of wearing away or removing soil, rocks, and land surfaces. It happens when natural forces like wind, water, or ice move these materials from one place to another.
The Main Causes of Erosion
There are several causes of erosion, and they are:
- Water: Rainfall and rivers can carry away soil and rocks, especially when the ground is bare and unprotected.
- Wind: Strong winds can pick up loose soil and sand, transporting them to other locations. This is common in dry and desert areas.
- Human Activities: Deforestation, construction, and farming practices can all contribute to erosion. For example, removing trees exposes the soil to the elements, making it more vulnerable to erosion.
- Ice: Glaciers are massive sheets of ice that can carve out valleys and transport rocks and soil as they move.
- Gravity: Landslides occur when gravity pulls soil and rocks down a slope, often triggered by heavy rainfall or earthquakes.
Evaluation Questions
Now that you’ve learned about erosion, let’s see if you can answer these questions:
- What is erosion?
- List three causes of erosion.
- Explain how human activities can contribute to erosion.
- Describe an example of erosion caused by water.
- What is one way we can prevent erosion?
Conclusion
We learned that erosion is the process of wearing away soil and rocks, and it can be caused by natural forces like water, wind, and ice, as well as human activities. Understanding erosion is important for protecting our environment and ensuring a sustainable future. Don’t forget to check the comments section if you have any questions, and use the navigation to move to the next lesson. See you in the next lesson!
