Pg. 30 RTW: What does “thermocline” mean? Monday, October 2 Pg. 30 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 test Friday!

Water Desalination Plant Obtaining reliable fresh water supplies from challenging water sources Pg. 33

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. 33 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

Get into a group of 3 people Tin can Hot plate Salt water Ice Aluminum foil Plastic wrap Small cups (paper/plastic) Large cups (plastic) Pipe cleaners Duct tape Yarn Plastic tubing Paper clips Straws 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 or bring it in tomorrow (not guaranteed, though)

Tuesday, October 3 Pg. 30 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

Tuesday, October 3 Objective: I will understand the process of desalination and create a successful desalination prototype. Agenda: Create your prototype Homework: Study for Test Friday!

1. ) Bags up front 2. ) You need your blue packet and a pen/cil 3 1.) Bags up front 2.) You need your blue packet and a pen/cil 3.)Set up your experiment Put the hot plate on high and the can on the hot plate

Wednesday, October 4 No RTW Objective: I will understand the process of desalination and create a successful desalination prototype. Agenda: Test your prototype Homework: Study for test Friday!

While your design is being tested: Fill out index card with team name & names If there is something inside your can sketch it out on your index card You will walk around to other groups and answer the second page When done, answer the back page and return to your experiment

Clean up Ms. D’Ambrosio will take the can off the burner CAREFULLY disassemble the experiment Pour water down sink Save the Can (rinse out with fresh water & place on cart) Tubing (Place this on front table) Throw out everything else

Do you think thermal desalination is a viable solution to fresh water shortages? Why or why not?

Thursday, October 5 Pg. 30 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. Complete all of the packet Turn in Desalination packet Review Homework: None 

Objective: I will understand the current patterns of the ocean. Friday, October 6 Objective: I will understand the current patterns of the ocean. Agenda: Unit 3 Test (Properties of Water & Desalination) Homework: None 

Bags up front You need your clicker Honors- sheet of paper and pen/cil for short response