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Inspirational Quote of the Day: “Let us remember: One book, one pen, one child and one teacher can change the world.”– Malala Yousafzai 

Objective: 7.2 Lesson 2- How do heaters get warm without a flame? 

Standards:

MS-PS1-6:

Undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical processes.

MS-ETS1-2:

Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.

MS-ETS1-3:

Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success.

MS-ETS1-4:

Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.

Warm-Up: Take 5 Warm-up

To Do List: 

1. Navigation Ingredients 

2. Prepare for Flameless heater and hand warmer investigations

3 Plan and carry out the flameless heater investigation as a class Video Link

4. Carry out the hand warmer investigation in small groups, Video Link

5 Have a building understandings discussion about our results

6. Have a building understandings discussion about our results

7. Navigation Consider based on this lesson's work what we should investigate next time.- We want to test different chemical reactions to determine if any of them cause an increase in temperature for use in our homemade flameless heater designs. Once we identify a reaction with which to move forward, we will investigate energy transfer from that system to the food system using an Energy Transfer Model.

Check for Understanding: Reflect on Norms

Circle of Trust

Norm Focused Reflection

We revise an investigation initially designed to see how hot flameless heaters and air-activated hand warmers get to collect additional data that could serve as evidence to support the idea that a chemical reaction is happening when the devices heat up. We research the different ingredients in each device and observe changes in the substances in the devices as they warm up to confirm new substances are made. We create an Energy Transfer Model using what we learn from these investigations. The class decides that while neither of the reactions we tested would be appropriate for our homemade heater, we should investigate other reactions. 

Homework: Flameless Heater Stakeholder Survey  Please interview family and friends about creating a homemade flameless heater to heat food during an emergency. Initials of the people interviewed please submit to Schoology. Due Thursday January 18th.