True. The components of a heterogeneous mixture are not uniformly distributed. In a heterogeneous mixture, the different substances are visibly distinct and can be easily separated. Examples include a salad, where you can see and pick out individual ingredients like lettuce, tomatoes, and cucumbers, or a mixture of sand and iron filings, where the sand and iron filings remain separate and can be distinguished from each other.
In contrast, a homogeneous mixture has a uniform composition throughout, meaning the components are evenly distributed and not easily distinguishable. Examples of homogeneous mixtures include saltwater or air, where the salt is evenly dissolved in the water, and the gases in the air are uniformly mixed.
Understanding the difference between heterogeneous and homogeneous mixtures is important in various scientific fields, including chemistry and environmental science, as it helps in identifying and separating substances based on their properties.