A battery lights a bulb. Describe the energy changes involved in the process.
When a battery lights a bulb, first energy transformation takes place in the battery and then in the bulb.
In the battery, the chemical energy gets converted into electrical energy.
Battery: Chemical energy → Electrical energy
In the bulb, the electrical energy from the bulb gets converted into heat energy and then into light energy.
Bulb: : Electrical energy → Heat energy → Light energy.
So, Energy Changes are
Chemical energy → Electrical energy → Heat energy → Light energy