All the water stays in the pipes
The water has most energy when it has just left the boiler, and least energy when it returns to the boiler
Adding more radiators will make it harder for water to flow around the circuit
Pipes let water flow through them
The boiler transfers heat energy to the water
Water flows through the pipes
The pump pushes the water through the pipes
If you measured the amount of water flowing, you would get the same answer everywhere in the central heating system
In the radiator, energy is transferred from the hot water to the room by heating
The cell pushes the charges around the circuit
If you measured the current flowing, you would get the same reading everywhere in the circuit
Charges flow through the wires
In the bulb, electrical energy is transferred to the surroundings by light and heating
The charges have the most energy when they have just left the cell, and the least energy when they return to the cell
Adding more bulbs will make it more difficult for the charges to flow around the circuit
All the charges stay in the wires
Wires let charges flow through them
The cell transfers energy to the charges
