Electricity

Penicillin

THREE INVENTIONS THAT CHANGED THE WORLD

Read about the three inventions that changed the world

Complete the sentences with the dates of the events described.

1) The telephone was invented in ….

2) Bell was working on both voice transmission and a “harmonic telegraph” by ….

3) He was visiting his parents in ….

4) Bell succeeded in transmitting speech sounds on ….

5) Bell married Mabel Hubbard in ….

5. Find answers to the following questions:

1) What were the first words spoken by Alexander Graham Bell into his experimental telephone?

2) What was the cutting-edge technology in 1870s?

3) What is a “harmonic telegraph”?

4) What did Bell understand while visiting his parents in 1874?

5) How did Bell announce his discovery?

6) Did Bell understand the importance of his discovery?

6. Translate the following words with the help of a dictionary.

Stumble, mold, implication, light bulb, carbon filament.

Throughout history, people have made inventions that changed the world. Some got lucky and stumbled on something, some actually set out to make something, and still others improved upon existing technology to create something revolutionary. We’re going to show what we consider the top 3 world changing inventions, from how they were found, to how they ended up being used.

Penicillin was actually discovered a bit by accident. It is credited to scientist Alexander Fleming in 1928. He noticed that certain mold could kill bacteria, which proved that there was an antibacterial agent in the mold.

Fleming did not actually invent penicillin though – he merely made popular the knowledge that there was an anti-bacterial agent in the mold Penicillium notatum. It was originally noticed by French medical student Ernest Duchesne in 1896. Fleming, however, saw the potential importance of what he named penicillin. In a 1929 paper, he noted that the results he observed could have medical implications if the anti-bacterial agent could be isolated and produced in quantity.

While most people generally attribute Benjamin Franklin as electricity discoverer, it isn’t entirely accurate. He did, however, lay the ground work for future scientists to make world changing breakthroughs, so there is some degree of accuracy in calling him the father of electricity.

The list of scientists who did groundbreaking work with electricity reads like a who’s who list of famous inventors – Thomas Edison, Allessandro Volta (volt), Andre-Marie Ampere (amp), Georg Simon Ohm (ohms), Nikola Tesla, Samuel Morse, and Alexander Graham Bell, among others. Each of them contributed to our modern electrical technology.

Дата добавления: 2015-05-24