Fabrics like wool and fleece are great insulators and will keep your body warm over an extended period of time. Fabrics like lace and cotton don't hold heat well, and won't keep your body warm very long. Why? To insulate something means to use a material that allows the least amount of heat to escape. Wool fibers are woven tightly together, and are much thicker than other materials, such as cotton. They don't allow much heat to escape, which means they are great insulators. Fabrics like cotton and lace are breathable fabrics, meaning they allow a great deal of heat to escape. They may be comfortable to wear, but they won't keep you from turning into an icicle on a cold day. Pat 2: Dressed for the Cold: Layering for the Best Combination Now that you know which fabrics keep water warm the best, try another insulation experiment to see how different combinations might work. Use the planning sheet on the next page to help plan your investigation. Then record your results in the space below. Try three of four combinations such as fleece and wool. Combination Rank from Start Final Rank from Best To best to Worst Worst Temperature Temperature What have you learned from this investigation?
Fabrics like wool and fleece are great insulators and will keep your body warm over an extended period of time. Fabrics like lace and cotton don't hold heat well, and won't keep your body warm very long. Why? To insulate something means to use a material that allows the least amount of heat to escape. Wool fibers are woven tightly together, and are much thicker than other materials, such as cotton. They don't allow much heat to escape, which means they are great insulators. Fabrics like cotton and lace are breathable fabrics, meaning they allow a great deal of heat to escape. They may be comfortable to wear, but they won't keep you from turning into an icicle on a cold day. Pat 2: Dressed for the Cold: Layering for the Best Combination Now that you know which fabrics keep water warm the best, try another insulation experiment to see how different combinations might work. Use the planning sheet on the next page to help plan your investigation. Then record your results in the space below. Try three of four combinations such as fleece and wool. Combination Rank from Best To Worst Start Temperature Final Temperature Rank from best to Worst What have you learned from this investigation?
Extreme%20Environments.docx