Unit 4bc Book

In the interview in Section 6 above, Edison described the most significant differences between a wax candle and a bulb. However, even the incandescent bulb that Edison invented has been overcome. Nowadays, we use LEDs (light-emitting diodes) instead. Write about the similarities and differences in this task. Finally, choose one or two inventions that have improved existing technology and write compare and contrast the new and the old models in about 250 words. You can compare/contrast two types of phone, a printing press and a printer, a bicycle and a motorbike, a radio and a television, a typewriter and a computer, a hot-air balloon and a plane. Of course, you can come up with your own topics. You may also find it useful to google some additional information on the technologies you have chosen for your comparison/contrast. Submit the finished text here.