Objective
By the end of this lesson, you will be able to understand the formation and characteristics of sand dunes.
Materials and Prep
- Sand (enough to create small sand dunes)
- A tray or shallow container
- A fan or hairdryer (optional)
- Access to a computer or books for research (optional)
Activities
- Introduction: Begin by asking the student if they have ever seen or played in sand dunes. Discuss their prior knowledge and experiences.
- Demonstration: Fill the tray or shallow container with sand. Show the student how to create small sand dunes by gently pouring sand and shaping it with their hands. Explain that sand dunes are formed by wind and sand particles.
- Experiment: If available, use a fan or hairdryer to simulate wind. Direct the airflow towards the sand dunes and observe how the wind affects their shape and movement. Discuss how wind erosion and deposition contribute to the formation of sand dunes.
- Research: Encourage the student to further explore sand dunes using a computer or books. They can learn about different types of sand dunes, such as crescent-shaped barchan dunes or long linear transverse dunes.
- Reflection: Have a discussion with the student about what they have learned. Ask them to describe the characteristics of sand dunes and explain how they are formed.
Third Grade Talking Points
- "Sand dunes are large hills made of sand."
- "They are formed by the wind blowing sand particles and building them up over time."
- "Wind erosion and deposition play important roles in shaping sand dunes."
- "Sand dunes can have different shapes, such as crescent-shaped or long linear dunes."
- "Sand dunes are found in deserts, coastal areas, and sometimes even in playgrounds or parks."