NO RTW Objective: I will understand the properties of water. Agenda: Monday, October 12th NO RTW Objective: I will understand the properties of water. Agenda: Blue Planet- Tidal Seas Questions pg. 36 Homework: None 

Pg. 38 RTW: What does “thermocline” mean? Tuesday, October 13th 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 desalination Design a prototype Homework: Study for quiz Friday!

Water Desalination Plant Obtaining reliable fresh water supplies from challenging water sources Pg. 37

Natural & Man-made Processes Water Cycle Thermal Desalination Process Sun heats water in oceans, lakes, streams... Water evaporates Water condenses to form clouds Rain falls back to the Earth Hot plate heats water in desalination plant Water evaporates Ice forces vapor to condense Water is collected in plant

Desalination Plant Please write & answer these questions on pg. 38 What is desalination? How much does it cost to filter 1 cubic meter of water ? What do they need to add to the water? Why do you think Israel has one of the largest desalination plants?

Your Objective Design a desalination plant Use a saltwater circuit to test the efficiency of the plant Improve the design until the plant reaches the design specifications Using the Saltwater Circuit to Test Efficiency: After water has been collected, students should use the saltwater circuit and the collected water to test the efficiency of their plant. If the light bulb on the circuit turns on then the water has too much salt in it and the plant is not efficient. If the light bulb does not turn on then the plant was able to remove the salt from the saltwater mixture. 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 Steps Understand 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 condensed water falling into saltwater plastic container saltwater evaporated water ice full foil cover no. 10 tin can Hot plate boils off water Vapor condenses on the bottom of the plastic container Condensate falls back into the saltwater mixture Condenses = Condensate = This design fails because the clean water falls back into the saltwater.

Pg. 38 Get into a group of 3 people On paper, draw out a model that labels all of the components of your desalination plant design. Describe how the process will work. If you need any supplies other than what’s listed, you may request them on the paper up front (not guaranteed, though)

Wednesday, October 14th Pg. 38 RTW: Match the process with the correct change in state or definition. Evaporation Precipitation Transpiration Condensation Liquid to gas Gas vapor to liquid Liquid that returns to the earth’s surface 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!

Thursday, October 15th 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!

Friday, October 16th 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 

Pg. 38 Water Desalination Plant Reflection Describe the thermal water desalination processes. What part(s) of the design process did you help with? What did you learn in this activity? How would you change this activity for future classes? How would you improve on your original design? Why? *Now draw out and label your new design*