Beginner Scuba Certification Practice Test 2025 - Free Scuba Certification Practice Questions and Study Guide

Boyle's Law is the principle that governs the behavior of gases under pressure, making it highly relevant to breathing while diving. This law states that at a constant temperature, the volume of a gas is inversely proportional to the pressure exerted on it. In other words, as pressure increases, the volume of the gas decreases, and conversely, if the pressure decreases, the volume increases.

When divers descend underwater, the surrounding water pressure increases significantly. According to Boyle's Law, the air in their lungs compresses and occupies a smaller volume. This is crucial for divers to understand because failing to equalize lung volume during ascent or descent can lead to barotrauma or other complications.

Understanding this relationship helps divers manage their breathing patterns and avoid potential dangers associated with changes in pressure underwater, making it fundamental to safe diving practices.