1. Salty Water Cleanup 2012

2. Wednesday, February 15th
Objective: You will be able to design a solution using the technological design process.
Warm up: What do scientists do? Be as specific as possible. Give examples of types of scientists.

3. Scientists & Engineers
Scientists try to understand how the natural world works.
Engineers use science to solve problems for people.
buses
cars
bridges
video games
buildings
trains

4. Independently read the introduction
What is the problem?
Materials to fix the problem: Large #10 can, a 30cm x 30cm piece of aluminum foil, plastic bottles, popsicle sticks, hot plate, plastic cups, tape, and ice

5. That means…What SCIENCE do you need to research to solve this problem?
One step at a time…#1
Research the Problem: Describe the information needed and how to collect that information.
That means…What SCIENCE do you need to research to solve this problem?
With your partner, write down as many science ideas as you can.

6. With your group, write down at least 2 ideas.
One step at a time…#2
Explore Ideas: Describe several ideas, including any useful scientific concepts.
That means…Brainstorm possible solutions. Use science words. Always list two or more ideas.
With your group, write down at least 2 ideas.

7. Step 3: Plan Summary = "choose one plan and explain WHY."
One step at a time…#3-6
Step 3: Plan Summary = "choose one plan and explain WHY."
Step 4: Steps to do the Plan = "like procedures, write out numbered steps"
Step 5: Diagram of solution = "must have labels."
Step 6: Test Solution = “what will I measure and record? How often?"

8. Common Problems with the Design
Why will this design never work?
Hot plate boils off water
Vapor condenses on the bottom of the plastic container
Condensate falls back into the saltwater mixture
hot plate
condensed water falling into saltwater
plastic container
saltwater
evaporated water
ice
full foil cover
tin can
Condenses =
Condensate = 8

9. What are the 6 steps to the technological design process?
Exit Ticket
What are the 6 steps to the technological design process?

10. In groups, FINISH your design. Your design is due at the end of class.
“Salty Water Cleanup”
In groups, FINISH your design.
Your design is due at the end of class.
You will build your designed device tomorrow!