Homonym: Acidity (Sourness)
Acidity refers to the level of acid present in a substance, often measured on the pH scale, which ranges from 0 to 14. A pH value below 7 indicates an acidic substance, while a value above 7 indicates a basic or alkaline substance. Common examples of acidic substances include lemon juice, vinegar, and battery acid.
In nature, acidity plays a crucial role in various processes, such as soil health and water quality. For instance, acid rain can harm ecosystems by lowering the pH of soil and water bodies, affecting plant and animal life. Understanding acidity is essential in fields like chemistry, biology, and environmental science.