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Lesson Planet
How does Mars move both eastward and westward in Earth's sky? A simple interactive describes the concept of retrograde motion using both color and graphic models. Learners understand that the speed of the orbit accounts for Mars' change in direction.
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Concepts
Additional Tags
Instructional Ideas
- Have classes create color models representing the areas of the retrograde motion of Mars
- Ask individuals to read the background information and write down key facts
Classroom Considerations
- Expects a solid understanding of planetary orbits in the solar system
- This content requires Adobe Flash to view
Pros
- Introduction gives valuable background information
- Exercises provide direction for lesson development
Cons
- None