The properties of materials refer to the characteristics that define how a material behaves under various conditions. These properties can be physical, such as density, melting point, and thermal conductivity, or mechanical, including tensile strength and elasticity. Understanding these properties helps in selecting the right materials for specific applications, such as construction or manufacturing. Additionally, materials can exhibit chemical properties, which describe how they react with other substances. For example, corrosion resistance indicates how well a material can withstand environmental factors without deteriorating. By studying these properties, engineers and scientists can innovate and improve products across various industries.