Heat Transfer                                                    Name: _______________

Worksheet                                                           Date: ___________

 

Would a wet hat be better at keeping you warm on a cold day than a dry one?

 

Which will cool the fastest? slowest? Does water make things better or worse insulators?

 

Heat Transfer Experiment

(1) Record temperature on thermometer every minute.  After measurements are taken over a few minutes (5-10 minutes; placing samples in a refrigerator saves time). 

 

(2) After you have collected this data, deconstruct the experimental tools (place empty test tubes and thermometers in room temperature water to return them to room temperature) and repeat (1). However, this time soak the hats in room temperature water before starting.

** Notice all of the constants across starting conditions (e.g. test tube size, water temperature, water amount).

 

Temperature in Dry Condition
Time in Seconds	Hat Type
	Hat 1 Material:	Hat 2:	Hat 3:
0 sec.	Starting Temp.:	Starting Temp.:	Starting Temp.:
Temperature in Wet Condition
0 sec.

 

 

Which of the heat transfer processes is occurring in the experiment? Explain where:

 

Which do you think is the most important in the experiment? Why not the other forms whatever the answer?

 

 

 

 

Beginning Class Work

 

 

Name some different types of hats.

 

 

What are some reasons people wear these hats?

 

 

 

Are all hat designs equally good for each of these purposes?

 

 

 

 

Are all materials for hats equally good for these purposes?