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*