Part 1 of 5 · freeIntroduction
You plug in your phone, and electricity arrives without a label. Nothing at the socket says whether it was made from sunlight, water behind a dam or fuel burned at a power plant. Even two homes on the same street cannot point to the plant that each unit of their power comes from.
The reason is simple: almost every home draws on an electricity grid, a network of wires linking power plants and users across an area. Several plants feed it at the same time, and their respective shares make up the electricity mix. That mix describes the sources supplying the network, not a separate stream of solar or gas electricity sent straight to your phone. The answer therefore begins well beyond the walls of your home.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2Steam, turbines and solar panels
- 3A mix that changes through the day
- 4What the yearly average hides
- 5Electricity from elsewhere
Open-book quiz8 questions whose answers are in the text.
Glossary7 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
