Final answer:
Yes, the density of air can change throughout a single day due to variations in temperature, air pressure, and humidity. Air density decreases with altitude and increases when the air is cooler, which typically occurs during the night.
Step-by-step explanation:
The correct answer to the question is A. True. The density of air can indeed change throughout a single day. This is because air density is affected by several factors, including temperature, pressure, and humidity. As the temperature changes during the day, typically warmer during the day and cooler at night, the density of air will change correspondingly. Warmer air is less dense than cooler air. Additionally, air pressure decreases with altitude, and this decrease in pressure also causes a decrease in air density. In fact, for a column of air of a constant temperature, the density decreases exponentially with altitude.
Furthermore, it's important to note that the density of an individual's body can also be affected by the air that's inhaled, as demonstrated by the fact that when you take a deep breath, the volume of your body increases, resulting in a