1. PBL Particle Motion & Heat Transfer
High School

2. SPS5. Obtain, evaluate, and communicate information to compare and contrast the phases of matter as they relate to atomic and molecular motion. a. Ask questions to compare and contrast models depicting the particle arrangement and motion in solids, liquids, gases, and plasmas. b. Plan and carry out investigations to identify the relationships among temperature, pressure, volume, and density of gases in closed systems. SPS7. Obtain, evaluate, and communicate information to explain transformations and flow of energy within a system. a. Construct explanations for energy transformations within a system. (Clarification statement: Types of energy to be addressed include chemical, mechanical, electromagnetic, light, sound, thermal, electrical, and nuclear.) b. Plan and carry out investigations to describe how molecular motion relates to thermal energy changes in terms of conduction, convection, and radiation. c. Analyze and interpret specific heat data to justify the selection of a material for a practical application (e.g., insulators and cooking vessels). d. Analyze and interpret data to explain the flow of energy during phase changes using heating/cooling curves.

3. Background
You own an ice cream vending cart and want to provide concessions at the Braves’ new SunTrust Park. Due to the smaller size of the new stadium, fewer vendors are contracted to sell concessions inside the stadium. You have decided to apply to SunTrust Park to be a vendor outside the stadium to sell your ice cream.

4. Problem
You have decided to provide a unique free giveaway with every ice cream cup purchased….an ice cream coozie! The ice cream coozie will keep the customer’s hand from freezing, and the ice cream from melting. You also want to promote the Braves with graphics on the outside. You need to plan, design, test and implement a prototype of three coozies made of different materials.

5. Solution 1. Design, plan and build a prototype of the coozies:
Has no more than a 5 degree temperature increase in 30 minutes in direct sunlight
Is made of recycled materials (found around your home…no new purchases) This is to keep your startup costs down.
2. You will submit your prototypes and a Vendor Application to the head of Suntrust Park Concessions for approval. Include the following:
Your design proposal and prototypes
Convincing argument on which coozie is best
Data that shows the effectiveness of your design
Depiction of phase changes from a particle perspective and how the design prevents/slows heat transfer

6. PROCESS You will study: Matter phases from particle perspective
Gas laws
Heat transfer
Heat capacity