Final Answer:
In a room with a heater on one side and a window allowing cool air in on the opposite side, a convection current is established. The diagram depicts warm air rising from the heater and cool air sinking near the window.
Step-by-step explanation:
Heater: The warm air near the heater is heated and becomes less dense. As a result, it rises towards the ceiling.
Cool Air Inlet (Window): On the opposite side, cool air from the window enters the room. This cool air is denser and tends to sink towards the floor.
Convection Current: The rising warm air and sinking cool air create a convection current in the room. This process establishes a continuous loop where warm air moves towards the ceiling, cools down, and descends near the window, forming a cycle of convection.
Labeling: The warm air is labeled as "Warm Air (Rising)" near the heater, and the cool air is labeled as "Cool Air (Sinking)" near the window. This labeling indicates the direction of movement for each air mass in the convection current.