Final answer:
Convection is the heat transfer through fluid movement, while convection currents refer to the actual flow of fluid created because warmer fluid rises and cooler fluid sinks.
Step-by-step explanation:
The difference between convection and a convection current relates to the process of heat transfer and the flow that results from this process. Convection is the transfer of heat through a fluid (which can be a liquid or a gas) as a result of molecular motion. When warmer parts of the fluid rise and cooler parts sink due to the change in density when temperature changes, this movement forms what is known as convection currents. For instance, when you heat a pot of water on the stove, the warmer water at the bottom rises while the cooler water at the top sinks, creating a circulation of water inside the pot. This is a visible example of convection currents at work.