Discussion of the section on liquid crystals

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Q1: What is the smallest temperature difference that you are able to distinguish by looking at the thermal sensing sheet? What is the temperature range where the color changes a lot with a few degrees?

Q2: The liquid crystal thermal sensing sheet was green when it was on the table. Gerry moved it to the chair and it turned brown. How much hotter or colder was the chair than the table?

The chair is 10 Celsius degrees warmer than the table     
The chair is 2 Celsius degrees warmer than the table     
The chair is 2 Celsius degrees cooler than the table     
The chair is 10 Celsius degrees cooler than the table     

Q3: On Wednesday the liquid crystal thermal sensing sheet was brown. On Thursday, it was green. What does this tell us?

The room got warmer     
The room got cooler     
The humidity increased     
The thermal sensing sheet is no longer working properly.     

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  The next section is about thermal conduction.   


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