Temperature-sensitive refers to materials or substances that change their properties or behavior in response to changes in temperature. For example, certain types of plastics may become softer and more pliable when heated, while others may become brittle in cold conditions. This characteristic is important in various applications, including electronics and packaging. In the medical field, temperature-sensitive products like thermometers and medications must be stored and transported within specific temperature ranges to maintain their effectiveness. If these items are exposed to temperatures outside their designated range, they may not function properly or could become unsafe for use.