1. Welcome Back! Open your binder to the table of contents
Have a sharpened pencil in your hand
Get ready to learn!

2. “Redesign” p. 104 March 10, 2011 9
Objective: You will be able to improve a solution design using the technological design process.
Do Now: How have cell phones changed in the last 20 years? Why haven’t they always looked like they do now?

3. Remember, engineers design solutions to problems.
But they don’t stop at the first design, they keep improving!

4. Technological Design Loop

5. Desalinization Reflection, p. 104
Not everyone’s design was successful in collecting water.
Work with your group to complete the reflection worksheet.

6. Successful Designs
What do they all have in common?

7. No plastic wrap Aluminum Can Hot Plate
We will not use saran wrap any more.
Why do you think that is?
It could explode! Why?
Aluminum Can
Hot Plate

8. Visualizing the particles
Hot

9. Visualizing the particles
Hot

10. Salty Water Cleanup Redesign
Work with your group to redesign your desalination plant so it makes more clean water
Label evaporation, condensation, precipitation, and collection on your diagram.
You may NOT build your design until I have checked your plans!
The group with the most clean water collect wins a prize!

11. If you finish early…
Make a vocabulary poster
Study flashcards

12. Exit Ticket, 3/10
How is your work today in class like the work of an engineer?
How have you improved on your earlier design?