Question

1. describe how thermal energy is transferred though a heated aquarium. indicate how energy enters the system and how it circulates within it.

Explanation:

Thermal energy enters the aquarium system via the heater (a heating element). The heater transfers thermal energy to the water molecules in contact with it through conduction. As the water near the heater gets heated, it becomes less dense and rises (convection). Cooler, denser water then moves in to take its place. This creates a convection current. The process continues, with the heater constantly adding thermal energy (entering the system) and the convection currents circulating the thermal energy within the aquarium.

Answer:

Thermal energy enters via the heater (conduction to nearby water). Circulates through convection currents (heated water rises, cooler water sinks and gets heated).