Transfer of thermal energy in circulation within fluids is a
A
conduction current.
B
convection current.
C
radiation current.
D
sublimation current.
B
convection current.
The correct answer is B. Convection current.
Convection is the transfer of thermal energy through the movement of fluids, such as liquids and gases. When there is a temperature difference within a fluid, the warmer regions tend to expand and become less dense, causing them to rise. At the same time, the cooler regions of the fluid then sink due to being more dense. This creates a circular motion called a convection current, which helps distribute the thermal energy throughout the fluid.
The transfer of thermal energy in circulation within fluids is known as a convection current. In a convection current, the hot molecules of the fluid gain thermal energy and become less dense, causing them to rise. As they rise, the cooler molecules take their place, and the cycle continues, creating a flow of thermal energy within the fluid. This process is observed in liquids and gases, where the molecules can move more freely.
To arrive at this answer, you can eliminate option D, "sublimation current," since sublimation is the process of a substance transitioning directly from a solid to a gas without becoming a liquid. It does not involve the circulation of thermal energy within a fluid.
Option C, "radiation current," is also incorrect. Radiation refers to the transfer of energy through electromagnetic waves, such as heat energy from the Sun to the Earth. While radiation can contribute to the transfer of thermal energy, it does not specifically involve the circulation within fluids.
This leaves us with options A, "conduction current," and B, "convection current." Conduction refers to the transfer of thermal energy through direct contact between particles within a solid or between solids in contact, rather than the circulation within fluids. Therefore, the correct answer is B, "convection current."