The deceptively cute Gray Jay is one of the most intrepid birds in North America, living in northern forests year-round and rearing chicks in the dark of winter. Highly curious and always on the lookout for food, Gray Jays eat just about anything, from berries to small animals. They may even land on your hand to grab a raisin or peanut.
A thermal insulator is something that prevents heat from moving from one place to another. There are 3 main ways that heat can travel: convection, conduction, and radiation. Typically the phrase 'thermal insulator' refers to a material that blocks conduction.
What keeps it in? The answer is a thermal insulator, or a material that doesn't conduct heat well. If the material resists the movement of heat, the heat stays in your house, keeping you warm. Today, we're going to test different materials to see which is the best thermal insulator. We'll be using a hair dryer as the source of heat and measuring the temperature on either side of the insulator.