Expanding agents are substances that increase in volume or size when exposed to heat or moisture. They are commonly used in various industries, including food production, construction, and manufacturing. Examples of expanding agents include baking soda and yeast, which help baked goods rise, and foaming agents used in insulation materials. In the context of materials science, expanding agents can create lightweight and durable products. They are often incorporated into plastics and composites to improve insulation properties and reduce weight. This makes them valuable in applications such as packaging and automotive manufacturing, where efficiency and performance are essential.