On a hot summer day, Marcello purchases balloons for his mother’s birthday. He leaves the balloons in his car while he goes into the grocery store. When he returns to his car, Marcello is surprised to discover that the balloons have burst. Why did the balloons burst?

The hot car warmed the gas inside the balloons. As a gas’s temperature increases, its volume tends to increase when the pressure is roughly constant. The balloons expanded until they burst, so the correct choice is “The temperature of the gas inside the balloons increased, causing the volume of the balloons to increase.”

AI-written and checked against the verified answer.