A trip to the seaside is always fun - even in winter!
But it does get a bit nippy and we need to warm up. A mug of hot chocolate! That'll do the trick and it'll help us understand solutions.
Solutions are simply one thing dissolved in another. You need a solute - that's the substance being dissolved - and a solvent - that's the substance that does the dissolving.
Salt and sugar are great examples of solutes. And water is a great example of a solvent. Salt and sugar both dissolve in water to make a solution.
Solvents can only dissolve a certain amount. When it can't dissolve any more, the leftover solute will stay in the liquid as a solid.
It's also possible to get back a solute that has been dissolved. Just boil the water. As the boiling water turns into steam and evaporates, the solid is left behind.
And then there are things that don't dissolve at all. Sand is one of them. Pepper is another.
It doesn't dis鈥 Oh, wait a minute! Aitchoo!
Ah, thanks Cara.
Video summary
In this short film we investigate solutions and how they are formed. We explore how two substances combine to form a solution and what their properties are.
It describes the way that two substances combine when forming a solution and what properties each type of substance needs to have.
It covers the concept of solute and solvents and the role of each in forming a solution. It also explores how solutions can be reversed and the processes for doing this.
Teacher Notes
This short film is an ideal tool to support pupils in developing an understanding of the complex processes of dissolving solids into liquids.
Points for discussion:路 What is a solution?
路 How can we form solutions?
路 What is a solute?
路 What is a solvent?
Suggested activities:
After watching this short film, you could work with pupils to investigate properties of solutions and how solids and liquids can be combined to form solutions.
Can pupils plan and carry out an investigation to find out how quickly sugar dissolves in water and how much sugar the water can hold?
Following this, can pupils make predictions before starting their investigation and develop graphs to show their results?
This short film is relevant for teaching science at KS1 in England and Wales, Foundation and KS1 in Northern Ireland and Early and 1st Level in Scotland.
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