Apply knowledge and skills related to simple machines, mechanisms, solar energy, movability, performance, and fair testing.
Solar energy can be captured and used in many ways. Solar panels convert solar energy into electrical energy, powering a variety of mechanisms.
A local food vendor would like a moving sign on his cart. He is only open during the summer and he wants to be noticed by people walking by.
To help in the design process, instruct students to look at the picture on the Student Worksheet and read the accompanying text.
Let students search the Internet to learn more about the appearance, structure and function of different sorts of sorts of carts and signs.
Discuss the constraints and functions they will have to take into account as described by the task.
Your task is to design and build a prototype solution of a moving sign, powered by solar energy.
Make sure it attracts attention.
Suggested Model Solution
Note: You are advised not to share this image with students.
Fair Testing and Fun
While the activity is in progress, encourage the students to relate their knowledge, skills and understanding to the task at hand by asking:
How will your moving sign work?
What different sorts of elements will you need?
How will you ensure that it is easy to use?
What mechanism will cause it to move?
How will you ensure that it is reliable?
How does the sign reflect what is being sold?
How will you ensure that it attracts attention?
When finished constructing, encourage students to reflect on both the product that they have produced and the processes they have used by:
Carrying out tests to evaluate the performance of the moving sign:
- Does the moving sign attract attention? To test if the moving sign attracts the attention of other students, let your students take it outside class and observe what happens.
- How will your moving sign work on a sunny day compared to a cloudy day?
- How easy is it to use?
- How reliable is it?
- What are its limitations, if any?
Recording their design by drawing or taking digital photos.
Adding notes to describe the way the model works and how this might be improved to get better performance.
Writing briefly on what went well in their design task and what they could have done to improve it.
Students will be able to apply the knowledge and skills of:
Applying principles of product reliability
Communicating and team working
Designing a prototype solution or prototype product
Renewable energy sources
Disciplinary Core Ideas: Physical Science
Cause and effect: Mechanism and explanation
Systems and system models
Energy and matter: Flows, cycles, and conservation
Structure and Function
Stability and change
Science and Engineering Practices
Asking questions and Defining Problems
Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Using mathematics, Informational and Computer Technology, and computational thinking
Constructing explanations and designing solutions
Engaging in argument from evidence
Obtaining, evaluating, and communicating information
Common Core English Language Arts