In this video we look at the basics of algebra, focusing on the notation that is used.
In algebra we use symbols to represent numbers. These symbols are called variables. Some reasons for using symbols instead of numbers is that the symbols, or variables, can represent unknown quantities and for showing formulae like the area of a circle.
Instead of writing a X b we remove the multiplication sign and just write ab instead. Two letters next to each other or a number and a letter, means those things are multiplied together.
We use a curly x for the letter because otherwise it looks like a multiplication sign.
Instead of the division sign, in algebra we usually write it as a fraction. Numbers are usually left as fractions rather than as decimals.
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Learn the basics about the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. What is Calorimeter? How does it measure heat? Find out more in this video!
This video is part of 'Chemistry for All' - a Chemistry Education project by our Charity Fuse Foun

You might have noticed that if you are trying to boil a lot of water it takes longer than if you only wish to boil a small amount of water.
This is all because of something called ‘heat capacity’. Keep watching to learn more.
Before we get into the details, it is important to realise that there i

An ecosystem can be defined as a large, highly interconnected area of the planet that is composed of several different biotic and abiotic components. A good example of an ecosystem would be an entire forest or mountain range.
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