Thursday, September 4, 2014

Heat Transfer Science Activities

By Guest Blogger: Jenessa Crandall

 Hello Fellow Teachers!

I have done a lot with the unit on Heat Transfer in the past year.  I did it for classroom placement, as well in my science methods college course!  I just wanted to share a couple of center ideas that both my sixth grade students and college peers really enjoyed!

The Dancing Quarter: Convection Experiment

   glass (empty) soda bottles
   hot water

Step 1: Have students put a dab of oil on side of the quarter.  You may need to help if it is a large container of oil. 
Step 2: Place the glass bottle into the bowl.
Step 3: Have the student place the quarter on top of the glass soda bottle, with the oil side facing down. (The oil acts as a sealant and keeps the air trapped inside the bottle).
Step 4: Tell the students to observe the quarter while you pour hot water (near boiling) into the bowl. 

The quarter should move around on top of the bottle.  This is best used as inquiry! I asked my students questions like: What do you see the quarter doing? How is that happening? Explain what heat process is taking place? I also like to extend and ask if any heat transfer process are taking place, other than convection.  Help them discover that conduction is also being used in this experiment.

Teacher Tip:  This experiment was originally called “The Dancing Penny” when I found it. I quickly discovered the most soda bottles had to big of an opening and pennies would just fall inside the bottle.  So I recommend using a quarter.  Also the initial experiment asks students to warm up the bottle with their hands.  This doesn’t give as obvious of a result so I adapted and chose to use hot water in the bowl so that students could see results immediately. I also highly recommend that you test this out on your own before you do it in the class so that you know how to make it work!

Popcorn: Radiation Experiment

   Popcorn (Unpopped)
   Individual cups for each student (solo cups)

This experiment is very simple! Place the popcorn in the microwave and ask them to observe and collaborate with one another to decide what heat transfer process is taking place. Its a simple way to show everyday use of radiation and gives them a tasty treat!

The Ice Melt: Conduction Experiment

   Ice cubes (one for each student)
   Ziploc bags

Step 1: Have each student take a Ziploc bag and an ice cube. Ask them to put he ice in their bag and seal it tightly.
Step 2: Tell the students that the objective is to melt their ice cube as fast as they can.  They are only allowed to use their body as a heat source, nothing more. On your mark, get set, GO!
Step 3:  After someone has melted their ice completely, discuss why their ice melted faster than everyone else’s. What method did they use? How did that create more heat?  What heat process was everyone using in order to melt their ice?

The kids love this mini competition and are very engaged! Great way to show them a simple form of conduction!

Before we did all these centers, we had students create a simple three flap foldable that had the definitions of conduction, convection and radiation so they could refer to them during the experiments.  We also had them write their findings and examples of each heat transfer on the other side of the flaps. At the end, they glued it into their interactive science notebooks!

Hopefully this information was useful! These centers are pretty easy to prepare but they are very engaging for students! Thats a win in any teacher’s world! Thanks for reading!

Special thanks to Guest Blogger Jenessa Crandall.