On a hot summer day, the air is warmer upstairs compared to the air that is downstairs. Which option best explains this circumstance?

Question

(a) The warmer air has a higher density, so it rises above the cooler air, less dense air is in the

basement while hotter, more dense air, is upstairs. (b) The warmer air has no density, so it rises above the cooler air, more dense air is in the basement

while hotter air is upstairs.

(c) The cooler air has a lower density, so it rises above the warmer air. Higher density air is in the

basement while hotter air (less dense) is upstairs.

(d) The warmer air has a lower density, so it rises above the cooler air. Higher density air is in the basement while hotter air (less dense) is upstairs.

Answer 1

(d) The warmer air has a lower density, so it rises above the cooler air. Higher density air is in the basement while hotter air (less dense) is upstairs.