DBH 3, Inventions

Gunpowder

Gunpowder is used in explosives. It was invented in the 9th century in Tang dynasty. It was employed in warfare to some effect from at least the 12th century. It was used in weapons such as fire arrows, bombs, and the fire lance before the appearance of the gun. Gunpowder was also used for non-military purposes such as fireworks for entertainment, or in explosives for mining and tunneling. The use of gunpowder technology also spread throughout the Islamic world and to India, Korea, and Japan.

BY: Asier

THE INVENTION OF THE IPHONE

Now a days,everyone have got very big and good mobile pones.They discuss a lot about which is the better mark of mobile phones and generally say that the iPhone is the best.

First,Apple engineers investigated the touch screen, under the direction of the former president of Apple.Then,On July 11, 2008, Apple launched the iPhone 3 in 22 countries.In Aprill 2003,Jobs believed that mobile phones were going to become important devices.By the time a lot of iphone's are in the world,but they are very expensive.

Finally, I think that the technology is going to grow and a lot of people would have new mobile phones.

BY: Xiomara

THE INVENTION OF THE FRIDGE

The fridge was invented in the year 1876 by Charles Tellier, a french inventor. The allow to the food stay in a good temperature and save it more time so then we can eat it in a good way. The fridge is consisted of an termostat to regulate the cold of the inside part, is controled by a charged compresor of gas. Like that the cold air stay inside and the hot one goes outside from a grate that is the down part. So, thanks to Charles Tellier for his work so like that we can keep our favourite food on a good way and then we can eat them!!

BY: Joane

         The Mac 

It was invented by Apple in 1984. The Macintosh project was begun in 1979 by Jef Raskin ,

 an Apple employee who envisioned an easy-to-use, low-cost computer for the average consumer.

 They made a lot of models of them. This machines were and are very expensive so many people 

couldn’t afford it. Most of the computers are in offices and educational places, such as schools. 

Apple has also developed a series of Macintosh operating systems; initially, this operating systems

 had no name but came to be known as the Macintosh System Software. 

BY: Mikel

The printing press

The printing press was invented by Johann Gutenberg in the 1430s.This idea was not easy.He had to do many things before this.

Firstly,he combined the idea of block printing with a screw press,then he develop a metal printing press and finally he invented the printing press.

This had change a lot of things in the world,bafore this,people had to write everything by hand and it was a very boring job.Nowadays printing presses are used all around the world.

BY: Maria

BATTERY - VOLTAIC PILE

Alessandro Volta an Italian physicist developed the first battery which gave a steady current using alternating layers of copper and zinc. Lew Urry developed the small alkaline battery in 1949. Volta took issue with Galvani’s claim that he had found electricity inside a frog, and set out to prove it was the contact of two dissimilar metals (the brass hook and the scalpel) that produced the electric charge. His experiments ended up producing the world’s first battery – the voltaic pile.  Now a days we still use lot's of things that have got batteries and this was invented in the XVIII century. This invention changed many lives because after this invention people could use electric produce without an electric plug or any cable connected to it, making them more practic tu use.

BY: Gotzon