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Coffee, espressos, and lattes have become more and more popular in the Pacific Northwest. Keeping coffee hot has become important to a lot of companies. What things affect how long coffee stays hot?

Here are some topics that you may choose, or you may choose your own topic:

• insulation thickness
• container surface area
• temperature of coffee
• size of opening of container
• air currents around container
• temperature of outside air
• coffee additives (such as milk or sugar)
• amount of coffee

After conducting an investigation and analyzing it, at the end of your report, you will propose a question/hypothesis related to cooling of a substance for further study.