Heat Transfers

Goal:
Conduct an investigation to identify how different variables affect the amount of heat transferred between objects. 

Agenda:
Warmup
Demo + Discussion
Experiment
Exit Ticket

Warmup
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Demo + Discussion
One balloon is full of carbon dioxide. The other balloon is full of water. If I hold a flame under them...
What is the direction of heat flow?
What is happening to the molecules inside the balloons?

Experiment
In this experiment we are going to make hypotheses about things that can change the amount of heat absorbed from water.

1. How can you measure the amount of heat transferred between substances?
2. Make a list of things you PREDICT will change the amount of heat transferred.
3. Design controlled experiments to test these predictions. 
4. Record your observations in your journal (Title: Ice Experiment). Here are some suggested sentence stems:
1. When we increased _________________, the temperature <increased or decreased> from _____ degrees Celsius to _____ degrees Celsius, a difference of _____ degrees. 
2. When we changed _________________, the temperature <increased or decreased> from _____ degrees Celsius to _____ degrees Celsius, a difference of _____ degrees. 
5. Make sense: what variables affected the heat transfer? Did this match your prediction?

Exit Ticket
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Teacher's Question:
What are the three variables that affect the amount of heat transferred between objects?