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Slide 2 By: Rebekah Greenspan and Lexi Smith CAN CHALLENGE Slide 3 1.Build the insulator 2.Pour hot water into the can and seal the top with your lid 3.Stick the thermometer through the lid into the can so it touches the bottom of the can. 4.Place the insulator in a plastic bag, then, the whole thing into a bucket of ice water 5.Monitor the temperature for 20 minutes. 6.Calculate the loss of temperature of your insulator WHAT IS THE CAN CHALLENGE? Slide 4 OUR OBJECTIVE Our objective was to apply our knowledge of heat and energy transfer to evaluate different materials and construct an insulator for a regular sized soda can filled with hot water. Slide 5 WHAT ARE INSULATORS? Insulators are materials whose atoms have tightly bound electrons. These atoms are not free to roam around and transfer energy to other atoms. Slide 6 WHAT IS HEAT Heat is thermal energy moving from a warmer object to a cooler one and thermal energy is the total energy in an objects particles Slide 7 Radiation: Convection: Conduction: TYPES OF HEAT TRANSFER Slide 8 WHAT WE USED Rubber Glove Cotton Slide 9 WHAT WE USED Styrofoam Foil: Slide 10 WHAT WE USED Wool Sock: Can (355ml) Duct tape: Slide 11 CONTAINER 10cm x 10cm x 20cm Slide 12 PROCEDURE 1. Stuff wool sock in bottom of container Slide 13 PROCEDURE 2. Place cotton and foil in bottom of glove 3. Place the glove inside the insulator Slide 14 PROCEDURE 4. Place the can in the glove Slide 15 1 ST TEST OF INSULATOR Slide 16 WHAT WAS WRONG? We noticed a lot of heat was escaping from the top of the box Slide 17 WHAT DID WE DO? We added extra padding for the lid with layers of foam, cork, and felt Slide 18 SECOND TIME TRIAL Slide 19 FINAL RESULTS OF THE CAN CHALLENGE Slide 20 WHY DID IT WORK? The materials we used minimized heat transfer Slide 21 WHAT WOULD HAVE MADE IT BETTER? Thinner Styrofoam Slide 22 ADDITIONAL QUESTIONS What would happen if we used our insulator in reverse? Slide 23 THANKS FOR WATCHING!