SHS Earth Science Quarter 2 – Week 1 Module 1- Weathering

Geological Processes

• Geologic processes can drastically alter rocks over short and long periods of time

Internal Geological Processes

• Processes that originate from within the Earth itself are referred to as internal geological processes

Learning Objectives

• After completing the learning material on weathering and Earth's interior, students are expected to have a thorough understanding of the topics

Academic Support

• Students who encounter difficulties with the lessons and activities should seek assistance from their teachers or peers
• If students need a little assistance with the learning material, they should review the previous topics and seek help when needed

Weathering Processes

• Frost wedging is a process that causes rocks to expand and fracture due to the freezing of water in cracks and crevices
• Mechanical weathering is a type of weathering that breaks rocks down into bits due to physical force, similar to physical change
• Exfoliation is the process where overlying rocks at the surface are removed, causing the underlying rocks to expand and fracture

Factors Affecting Weathering

• Living organisms are not involved in the weathering of rocks
• High temperature causes rocks to expand and fracture when exposed to it

Frost Wedging

• Frost wedging is most prevalent in cold regions
• Frost wedging leads to the formation of potholes in roads during winter

Chemical Composition

• Physical or mechanical weathering does not alter the chemical composition of rocks

Soil Formation

• One of the processes that lead to soil production is mechanical weathering

Exfoliation

• When the pressure diminishes from overlying rocks at the surface, the underlying rocks expand and fracture