Across
- 4. There are many windmills producing ... on the north coast of Poland.
- 7. A TV, a fridge and a washing machine need it to work.
- 10. Scientists are still looking for safer and cleaner ... .
- 12. It comes from under the ground. It's black and hard.
Down
- 1. Thomas Edison was a famous ... who invented a light bulb.
- 2. ... can be very dangerous
- 3. The black panels on the roof of my house use ... to produce electricity.
- 5. Columbus found a sea route to America. It was a great ....
- 6. Many cars use ... to operate.
- 8. You do experiments here.
- 9. It comes from trees. People burn it for heating.
- 11. It comes from under the ground. It can be used in cookers