by Dan Meyer

• 1. Do you think Joulies will work as advertised? Why or why not?
• 2. How could we set up an experiment to test your answer?

• video — introduction to joulies

• 3. What would graphs of temperature v. time look like if Joulies work? Draw the graph for a drink with Joulies and without Joulies.
• 4. What assumptions have you made in your graphs?

• file — the first set of graphs

• 5. Now that you see what a graph of temperature looks like for a regular glass of hot liquid, revise your Joulies graph. If Joulies work, how will its temperature graph look?

• image — the no joulies graph
• video — the no joulies graph
• file — the second set of graphs
• image — the price of five Joulies

• image — the no joulies graph
• video — the joulies graph
• file — student work

• image — the rocks graph
• video — the rocks graph
• file — the third set of graphs

• 6. Write an argument. Do Joulies work or not? Refer to the graphs to support your case.
• 7. If you defined "perfect temperature" differently, could you make the opposite case?