Final answer:
When identical kites are heated, they experience a decrease in air density leading to a buoyant force that causes them to fly higher. This is a physics principle relating to buoyancy in heated objects.
Step-by-step explanation:
The question appears to be in the context of physics, specifically related to the principles of thermodynamics and buoyancy. When four identical kites are heated to the same temperature, they will experience a decrease in their air density compared to their surroundings. This is similar to the operation of hot air balloons as outlined in Figure 9.1. According to the principles of buoyancy, the hot air inside these kites or balloons is less dense than the surrounding cooler air, which results in a buoyant force that causes them to rise. Therefore, the correct answer in this context would be B: the kites would Fly higher after being heated.
Now, consider a different scenario where we're dealing with a heated pan and convection rolls. If two pots of water are used—one heated on a stovetop and the other left at room temperature—the food coloring in the heated pot will demonstrate convection currents as the water rises and falls due to changes in temperature and density, which does not happen in the unheated pot. This is an experiment that demonstrates convection in a fluid, which is a mode of heat and mass transfer.