Which best describes the shape of a convection current?

Which best describes the shape of a convection current?

• A. linear
• B. spiral
• C. circular
• D. wave

Answer: (C)

Convection currents form circulating loops because hot fluid rises due to buoyancy and cool fluid sinks, creating a continuous cycle. In a typical convection cell, this flow closes on itself, producing a circular loop that represents the closed, repeating circulation of fluid as heat is transferred. A linear path wouldn’t close on itself, a spiral implies a changing radius around a center, and a wave involves propagating crests and troughs rather than a steady closed loop. So circular best describes the shape.

Convection currents form circulating loops because hot fluid rises due to buoyancy and cool fluid sinks, creating a continuous cycle. In a typical convection cell, this flow closes on itself, producing a circular loop that represents the closed, repeating circulation of fluid as heat is transferred. A linear path wouldn’t close on itself, a spiral implies a changing radius around a center, and a wave involves propagating crests and troughs rather than a steady closed loop. So circular best describes the shape.