Which statement describes how fluids change as they travel through different portions of convection currents in the sun's convection zone?

Which statement describes how fluids change as they travel through different portions of convection currents in the sun's convection zone?

• A. They become more dense at the inner portion of the convection currents.
• B. They become more dense at the outer portion of the convection currents.
• C. They become less dense at the inner portion of the convection currents.
• D. They become less dense at the outer portion of the convection currents.

Answer: (B)

In convection currents, hot fluid is less dense and tends to rise, while cooler fluid is more dense and sinks. In the Sun’s convection zone, plasma near the bottom is very hot and rises toward the surface. As it moves upward, it expands in the lower-pressure environment and cools. That cooling increases its density relative to the surrounding plasma, so once it reaches the outer region it becomes denser and begins to sink, completing the loop. So the outer portion of the convection currents is where the fluid is more dense.

In convection currents, hot fluid is less dense and tends to rise, while cooler fluid is more dense and sinks. In the Sun’s convection zone, plasma near the bottom is very hot and rises toward the surface. As it moves upward, it expands in the lower-pressure environment and cools. That cooling increases its density relative to the surrounding plasma, so once it reaches the outer region it becomes denser and begins to sink, completing the loop. So the outer portion of the convection currents is where the fluid is more dense.