Begin with an engaging story about the Twelve Apostles and the Chocolate Hills, highlighting how these landscapes were shaped by chemical weathering.
Go to the LessonLearning Objectives
- Understand the process of chemical weathering and how it changes rocks.
- Identify the role of oxygen in the chemical weathering of rocks.
- Explain how acid rain contributes to chemical weathering and affects rocks like limestone.
- Describe the effects of rusting on rocks containing iron.
- Recognize real-world examples of landscapes shaped by chemical weathering, such as the Twelve Apostles and the Chocolate Hills.
Introduction and Hook
Introduce the concept of chemical weathering and its impact on rocks using real-world examples.
Direct Instruction
Explain the process of chemical weathering, focusing on the role of oxygen and acid rain.
Discuss the effects of rusting on rocks containing iron and how it contributes to chemical weathering.
Guided Exploration
Watch the video 'Weathering and Erosion – A Visit to Bryce Canyon National Park' to understand physical weathering processes and how they differ from chemical weathering.
Engage in a discussion about the video and encourage students to identify examples of chemical weathering in their environment.
Hands-On Activity
Conduct an experiment using chalk and vinegar to demonstrate chemical weathering. Observe the reaction and record observations.
Independent Practice
Assign students to research and present on a specific landscape shaped by chemical weathering, such as the Chocolate Hills.
Check for Understanding
Conduct a class discussion to review key concepts and address any misconceptions about chemical weathering.
Use formative assessment techniques such as exit tickets to gauge student understanding.
Review and Reflection
Have students reflect on what they learned about chemical weathering and its impact on the Earth's surface.
Encourage students to share their thoughts on how human activities might influence chemical weathering.
Assessment and Extension
Administer the 'Processes That Shape the Earth' quiz to assess student comprehension of chemical weathering.
Try the Quiz