Question

about the densities of the objects that float? what do you notice about the densities of objects that sink? the objects with less than 1 density float since they are lighter than water. 10. use your understanding of density to explain the following sentence as you would to a younger student: hot air rises; cold air sinks.

Explanation:

Density is about how much mass is in a certain volume. Hot air has lower density than cold air because heating makes air molecules spread out. So, like lighter - density objects float in water, hot air (lighter density) rises and cold air (higher density) sinks.

Answer:

Hot air has lower density than cold air. Just as objects with lower density float, hot air rises because it is less dense, and cold air, which is denser, sinks.