Which condition is true regarding dissolved oxygen levels in water?

Cooler water holds more dissolved oxygen than warmer water due to the physical properties of gases. As the temperature of water increases, the solubility of oxygen decreases, meaning that warmer water can hold less oxygen overall. This phenomenon is crucial for aquatic life, as higher levels of dissolved oxygen support the respiration of fish and other organisms.

In contrast, as water cools, it can hold a greater amount of dissolved oxygen. Therefore, maintaining cooler water temperatures in aquatic environments is essential for promoting healthy ecosystems and supporting diverse marine life. Understanding this relationship between temperature and dissolved oxygen is vital for power engineering, especially when considering the environmental impact of cooling systems in power plants and other industrial processes.