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NO RTWObjective: I will understand the properties
of water.
Agenda: Blue Planet- Tidal Seas Questions pg. 36
Homework:None
Monday, October 12th
Pg. 38 RTW: What does “thermocline” mean?
Objective: I will understand the process of desalination and design a successful desalination prototype.
Agenda: Discuss the process of desalinationDesign a prototype
Homework:Study for quiz Friday!
Tuesday, October 13th
Obtaining reliable fresh water supplies from challenging water sources
Pg. 37
Natural & Man-made ProcessesWater Cycle Thermal Desalination
Process
Sun heats water in oceans, lakes, streams...
Water evaporatesWater condenses to form
cloudsRain falls back to the Earth
Hot plate heats water in desalination plant
Water evaporatesIce forces vapor to condense Water is collected in plant
Desalination PlantPlease write & answer these questions on pg. 381. What is desalination?
2. How much does it cost to filter 1 cubic meter of water ?
3. What do they need to add to the water?
4. Why do you think Israel has one of the largest desalination plants?
Your ObjectiveDesign a desalination plantUse a saltwater circuit to test the
efficiency of the plantImprove the design until the plant
reaches the design specifications
Design specifications: Your plant should be able to significantly remove the salt content from a saltwater
mixture. We will test you plant using the saltwater circuit.
Engineering Design Loop StepsUnderstand the need
Brainstorm designs
Select a design
Build a prototype
Test
Improve the design
Engineers look for opportunities in problems society faces
Generate ideas on how to address the identified need
Pick the most promising design or combination of designs
Build your design
Find out if the design meets the design specifications
Make improvements to reach or exceed design goals
A Failed Desalination Plant Design
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
no. 10 tin can
This design fails because the clean water falls back into the saltwater.
Pg. 38 1. Get into a group of 3 people2. On paper, draw out a model that labels all
of the components of your desalination plant design.
3. Describe how the process will work.4. If you need any supplies other than what’s
listed, you may request them on the paper up front (not guaranteed, though)
Pg. 38 RTW: Match the process with the correct change in state or definition.1. Evaporation
2. Precipitation
3. Transpiration
4. Condensation
a. Liquid to gas
b. Gas vapor to liquid
c. Liquid that returns to the earth’s surface
d. Vapor that enters the atmosphere from the leaves of plants
Wednesday, October 14th
Objective: I will understand the process of desalination and create a successful desalination prototype.
Agenda: Create your prototype
Homework:Study for quiz Friday!
Wednesday, October 14th
Pg. 38 RTW: Do you think thermal desalination is a viable solution to fresh water shortages? Why or why not?Objective: I will understand the process of
desalination and create a successful desalination prototype.
Agenda: Test your prototype & redesign
Homework:Study for quiz tomorrow!
Thursday, October 15th
Pg. 38 RTW: What could be some negative impacts of thermal desalination?
Objective: I will understand the process of desalination and create a successful desalination prototype.
Agenda: Reflect on your design and the desalination process.Quiz!Turn in Water Properties Lab
Homework:None
Friday, October 16th
Pg. 38 Water Desalination Plant Reflection
1. Describe the thermal water desalination processes.
2. What part(s) of the design process did you help with?
3. What did you learn in this activity?
4. How would you change this activity for future classes?
5. How would you improve on your original design? Why?
*Now draw out and label your new design*
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