Maya is 13 years old, and lives with her family in Bangalore, India. She wants to tell us a bit about Istanbul, and show us the parts of the city that she loves.
Warning – this article may make you want to jump on a plane to Turkey!
Who Invented the First Electric Battery?
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.
Featured Image by Thomas Kelley on Unsplash
Winter Wonderings – Why Can You See Your Breath When it is Cold?
This is the first in a series of posts by Sam Gouldson called Winter Wonderings. Sam will take a closer look at some of the amazing things that winter brings, such as snowflakes, ice and snow and explain the science behind the season!
You may have noticed that you can see your breath when the weather is cold, especially if you exhale really hard. But what causes this and why doesn’t it happen when it’s warm?
Why DO Kids Want to Play Minecraft?
Sitting back, ready for another interesting and rather aggressive night on COD (Call of Duty), I launch my dashboard to see the usual suspects all gathered playing the latest shoot ’em ups.
Except one. Looking again, I notice my 13-year-old brother Jimbob is playing a game I’ve never seen – MINECRAFT.
After much persuasion and explanation “COME ON BRO, BUY IT PLEASE, YOU BUILD STUFF”, I decide to purchase it, in order to support him in our mum’s campaign to play online more responsibly.
The game launches and all I see is blocks. Have I got the right game? Where are the graphics?
Wandering mindlessly around, past trees, rivers and spiders, until Harvey Jimbob asks me to come to his house. Here’s the strangest part: he built it.
The US Election – An Explainer for Kids
The voting system in the US election often confuses people. What is an Electoral College, and what is the difference between the ‘popular vote’ and the ‘electoral college vote’? Who are the people who work in Congress, and what is the difference between the Senate and the House of Representatives? We take a closer look and answer these and other questions, in a kid-friendly way.