How does a heater in one corner of a fish aquarium warm the whole aquarium?
• The heater warms the glass of the aquarium, which warms the water.
• The heater warms the air above the aquarium, which warms the water.
• The heater creates convection currents, which transfer warmer water away from the heater and cooler water toward the heater.
• The heater adds thermal energy evenly to the aquarium's water.
The correct answer is: The heater creates convection currents, which transfer warmer water away from the heater and cooler water toward the heater.
By creating convection currents, the heater circulates the warmer water throughout the aquarium, ensuring that the entire tank is heated evenly. This helps to maintain a consistent temperature throughout the aquarium.