Question

while scuba diving with some friends, deshawn notices that the air bubbles exhaled by his friends increase in size as they get closer to the surface of the water. why does this occur and which gas law explains it?

Explanation:

As the bubbles rise, the water pressure decreases (pressure is lower near the surface). Boyle's Law states that for a fixed amount of gas at constant temperature, pressure ($P$) and volume ($V$) are inversely related ($P_1V_1 = P_2V_2$). When pressure ($P$) decreases, volume ($V$) increases, so the bubbles expand. Boyle's Law (a gas law) explains this.

Answer:

This occurs because water pressure decreases as the bubbles approach the surface. Boyle's Law (which states that for a given amount of gas at constant temperature, pressure and volume are inversely proportional) explains it: as pressure on the bubble decreases, its volume increases, making the bubble grow in size.