Begin the lesson by discussing the concept of physical weathering. Use the example of the Grand Canyon to illustrate how natural forces like water and wind shape the Earth's surface over time.
Go to the LessonLesson Plans
Physical Weathering
Learning Objectives
- Identify different forces that contribute to physical weathering.
- Explain how moving water causes physical weathering of rocks.
- Describe the process of frost wedging and its effects on rock formations.
- Discuss the role of wind in the physical weathering of rocks.
- Understand how plants and animals contribute to physical weathering.
Introduction and Hook
Introduce the learning objectives, focusing on identifying forces that contribute to physical weathering and understanding their effects.
Direct Instruction
Explain the process of frost wedging using examples from Bryce Canyon National Park. Discuss how water freezing in rock crevices causes expansion and eventual rock breakage.
Discuss the role of moving water in physical weathering, using the Grand Canyon as an example of how rivers shape landscapes over millions of years.
Guided Exploration
Explore how wind contributes to physical weathering by carrying particles that chip away at rocks. Use the example of Wave Rock in Western Australia.
Discuss how plants and animals contribute to physical weathering, such as tree roots growing into rock cracks and animals moving on rocks.
Hands-On Activity
Conduct an experiment to simulate frost wedging using clay balls and water. Observe and record the changes as the water freezes and expands.
Use the 'Physical Weathering' assessment to engage students in hands-on activities that simulate weathering processes. This helps assess their understanding by analyzing and interpreting the effects on the clay balls.
Independent Practice
Assign students to research a specific type of physical weathering and present their findings to the class. Encourage them to use examples and visuals to support their explanations.
Check for Understanding
Use the 'Comprehension – Weathering' assessment to evaluate students' understanding of physical weathering processes. This includes fill-in-the-blank questions and encourages critical thinking.
Review and Reflection
Facilitate a class discussion to review the key concepts of physical weathering. Encourage students to share their insights and reflections on how these processes impact the Earth's surface.
Assessment and Extension
Conclude the lesson with a quiz to assess students' comprehension of physical weathering. This quiz helps reinforce learning and identify areas that may need further clarification.
Try the QuizEncourage students to explore additional resources on physical weathering, such as documentaries or articles, to deepen their understanding of the topic.
