https://padlet.com/lana_sk_school/inventions Here are some examples to Inventions that changed the world. Now it's your turn : Add one more Invention to the list, explain what this Invention is, who invented it, when it was invented and what was the contribution of this invention. en-us 2018-05-21 07:18:39 UTC 2018-07-22 08:47:40 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Watchclock.png lana_sk_school https://padlet.com/lana_sk_school/inventions/wish/262288243  No one knows who invented the plow, or exactly when it came to be. It probably developed independently in a number of regions, and there is evidence of its use in prehistoric eras. Prior to the plow, humans were subsistence farmers or hunter/gatherers. Their lives were devoted solely to finding enough food to survive from one season to the next. Growing food added some stability to life, but doing it by hand was labor intensive and took a long time. The plow changed all that.

Plows made the work easier and faster. Improvements in the plow's design made farming so efficient that people could harvest far more food than they needed to survive. They could trade the surplus for goods or services. And if you could get food by trading, then you could devote your day-to-day existence to something other than growing food, such as producing the goods and services that were suddenly in demand.

The ability to trade and store materials drove the invention of written language, number systems, fortifications and militaries. As populations gathered to engage in these activities, cities grew. It's not a stretch to say that the plow is responsible for the creation of human civilization.

]]> 2018-05-21 07:54:38 UTC https://padlet.com/lana_sk_school/inventions/wish/262288243 lana_sk_school https://padlet.com/lana_sk_school/inventions/wish/262292556 Like many of the inventions on this list, the man we believe invented the printing press (Johann Gutenberg in the 1430s) actually improved on pre-existing technologies and made them useful and efficient enough to become popular. Gutenberg combined the idea of block printing with a screw press (used for olive oil and wine production). He also developed metal printing blocks that were far more durable and easier to make than the hand-carved wooden letters in use previously. Finally, his advances in ink and paper production helped revolutionize the whole process of mass printing.

The printing press allowed enormous quantities of information to be recorded and spread throughout the world.

Books had previously been items only the extremely rich could afford, but mass production brought the price down tremendously.
The diffusion of knowledge it created gave billions of humans the education they needed to create their own inventions in the centuries since]]> 2018-05-21 08:25:39 UTC https://padlet.com/lana_sk_school/inventions/wish/262292556 lana_sk_school https://padlet.com/lana_sk_school/inventions/wish/262294188 We immediately think of Thomas Edison as the electric light bulb's inventor, but dozens of people were working on similar ideas in the 1870s,  Joseph Swan did similar work in Britain at the time, and eventually the two merged their ideas into a single company, Ediswan.
The bulb itself works by transmitting electricity through a wire with high resistance known as a filament. The waste energy created by the resistance is expelled as heat and light. The glass bulb encases the filament in a vacuum or in inert gas, preventing combustion.

You might think the light bulb changed the world by allowing people to work at night or in dark places (it did, to some extent), but we already had relatively cheap and efficient gas lamps and other light sources at the time. It was actually the infrastructure that was built to provide electricity to every home and business that changed the world.

]]> 2018-05-21 08:34:26 UTC https://padlet.com/lana_sk_school/inventions/wish/262294188 lana_sk_school https://padlet.com/lana_sk_school/inventions/wish/262308417 2018-05-21 09:59:30 UTC https://padlet.com/lana_sk_school/inventions/wish/262308417 https://padlet.com/lana_sk_school/inventions/wish/270780339 2018-07-22 08:47:36 UTC https://padlet.com/lana_sk_school/inventions/wish/270780339