🎴 Flashcard Mode
Water Resources and Pollution Quiz
Card1 / 24
Mastered0
Review0
QuestionClick to flip
Concentrations of substances are often expressed as:
AnswerClick to flip back
A
parts per million
💡 Explanation:
Concentrations of trace substances, such as pollutants in water or chemicals in soil, are commonly measured in parts per million (ppm) to express very small ratios.