| Hint | Answer | % Correct |
|---|---|---|
| Industrial Revolution (18th century) | Coal | 88%
|
| Use in lighting (19th century) | Natural Gas | 33%
|
| Used as Fuel in bog regions (Ancient Times) | Peat | 30%
|
| Photovoltaic Cells (1954, Bell Labs) | Solar Energy | 25%
|
| Thomas Edison and Nikola Tesla (late 19th century) | Electricity | 23%
|
| Windmills (Middle Ages, Netherlands) | Wind Energy | 23%
|
| Manhattan Project (1940s) | Nuclear Energy | 20%
|
| Water Wheels (Ancient Greece) | Hydropower | 18%
|
| Drilling in pennsylvania (1859) | Petroleum | 15%
|
| Firewood, Animal Dung (early human societies) | Biomass | 13%
|
| Formation over millions of years | Fossil Fuels | 13%
|
| Used for bathing (Ancient Rome) | Geothermal Energy | 8%
|
| Early prototypes developed in the 20th century | Wave Energy | 5%
|
| La Rance Tidal Power Station (France, 1966) | Tidal Energy | 3%
|
| Rudolf Diesel (1895) | Biodiesel | 0%
|
| Usage in transportation (19th century) | Compressed Natural Gas | 0%
|
| Sir William Grove (1839) | Hydrogen Fuel Cells | 0%
|
| Produced from wood (19th century) | Methanol | 0%
|
| Hydraulic Fracturing (1940s) | Natural Gas Fracking | 0%
|
| Concept developed in the 1930s (OTEC) | Ocean Thermal Energy Conversion | 0%
|