Rosetta is a spacecraft built by the European Space Agency; its primary objective is to help understand the origins and evolution of our solar system. In order to do this it has spent the last decade travelling into deep space so that it can rendezvous with a comet. Philae is the lander that has descended to the surface of the comet in order to take measurements and readings.
At the large livery yard I used to work at, I rode a range of bigger horses and exercised show jumpers and ex-racehorses for owners who were on holiday. Two in particular will always be in my memory as they were both utterly bonkers.
When we talk about electric batteries, we often talk about voltage. But did you know that this word is named after the person who invented the first electric battery? First, let’s take a look at what a volt is, and then we’ll find out more about the guy who gave the ‘volt’ its name.
What is a Volt?
A volt is defined as a unit of electric potential and electromotive force, and voltage refers to the number of those units. That sounds a lot more complicated than it is! If you think of the water in a tap being like the electricity running through a wire, the voltage means the amount of pressure. This video is quite long but explains it very well.
Why are Volts Called Volts?
Alessandro Volta
The term actually comes from a name. It was coined in honour of Italian physicist Alessandro Volta, who is recognised as the inventor of the first electric battery. During the 1790s, Volta worked on the theories of electricity of the day.
Volta disagreed with the theory proposed by fellow Italian scientist Galvani that electricity was generated by animal tissue. Instead of experimenting on frogs or other animals, Volta did experiment after experiment with metals.
His persistence paid off, and in 1800, he invented the world’s first battery, known as the ‘voltaic pile’.
The Voltaic Pile
This voltaic pile was simple but ingenious. It consisted of a pile of zinc and silver discs. But alternating between them was a piece of cardboard, or a piece of cloth, that had been soaked in saltwater.
There was a wire that connected the zinc disc on the bottom to the silver disc on the top, and this wire was capable of producing sparks.
What else Did Volta Invent?
The invention of the first electric battery brought Volta the most fame and recognition, but he also made other discoveries. He invented the electrophorus, a device that could transfer an electrical charge to other objects, as well as an electrical condensor, and the voltaic cell.
He is also known for having discovered and isolated methane gas. After his death, the volt and voltage were named in his memory.
What about Galvani?
Luigi Galvani
Yet there is one more twist to the tale. Volta’s longstanding colleague Galvani of the animal electricity theory also left his name in our language. When we say ‘galvanise’ or ‘galvanism’, that is where it comes from.
Despite their differing theories, there was no rivalry between the two scientists. They were both more concerned with the pursuit of knowledge than with whose theory would prove to be right, and it was Volta who first coined the word ‘galvanismo’ in Italian.
After the popularity of our Science Resources for Kids List, we’ve been asked to make a list of recommendations for history resources for kids.
We will update this list in the coming months, and will concentrate on resources you can access online – YouTube channels, online archives, websites and blogs. Don’t forget to look at the Jump! Mag History archive.
If you know any that we have missed, do leave a comment below.
Sometimes sad things happen, and when that happens we need a hug.
Sometimes sad things happen to people we know, and we offer them a hug.
Sometimes sad things happen to people we don’t really know and we feel helpless. We want to offer comfort but don’t know how. We want to hug them, but they are too far away, or not really good enough friends so that we feel we can offer a hug.
