Energy Crossword

1. The ancient records of China and Japan are said to contain many allusions to the use of natural gas for lighting and heating. ____ was known as burning water in Japan in the 7th century.
5. The earliest known oil wells were drilled in China in 347 CE. These wells had depths of up to about 240 metres (790 ft) and were drilled using bits attached to bamboo poles. The oil was burned to evaporate brine producing salt. By the 10th century, extensive bamboo ____ connected oil wells with salt springs.
8. Do you think that renewables can replace ____?
11. This type of power supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other renewable sources combined and also more than nuclear power.
12. “Wind farm” is another word for ____ plant.
13. Oil ____ is sedimentary rock. It contains kerogen from which liquid hydrocarbons can be produced.

2. Oil still remains the main ____ fuel nowadays.
3. ____ power is generated by converting power from tides into useful energy.
4. Photovoltaic solar or onshore wind are ____. Is nuclear power one of ____, too?
6. We can’t rely on oil forever. Its resources are ____.
7. ____ energy is extracted from the Earth's crust and combines energy from the formation of the planet and from radioactive decay. It has been used for heating dwellings since Roman times. ____ plants produce power which is stable and does not depend on weather conditions.
9. Wind ____ are an increasingly important source of intermittent renewable energy, and are used in many countries to lower energy costs and reduce reliance on fossil fuels.
10. Some sources claim that from the 9th century, oil ____ were exploited in the area around modern Baku, Azerbaijan, to produce naphtha for the petroleum industry.