Summer Two – Super Scientists: Changing States of Matter

I can’t believe how quickly this year has flown by; it is already time for your final project in Year Five!

This half term, we will be using our skills as scientists to explore different states of matter, physical and chemical changes, and to separate mixtures and solutions in different ways. There will be plenty of opportunities for experiments, but you could research any of the questions below for extra knowledge to help with your predictions.

Are all changes reversible? 

What is a chemical reaction? 

What is the difference between a mixture and a solution?

Which states of matter are involved when an ice cube melts into water? Can you think of any similar examples?

What happens to steam when it rises into the air? 


Try this quiz about reversible and irreversible changes. How many did you get correct? 

Reversible and Irreversible Changes Quiz

37 Responses

  • Rida says:

    Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

  • Rida says:

    In both Mixtures and Solutions, two or more substances are physically combined. In solutions, one substance is dissolved into the other, but in mixtures substances do not dissolve. The solute dissolves in the solvent to form a solution.

  • Rida says:

    Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter’s chemical makeup or chemical properties. Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.

  • Aaminah says:


    Molecules are little tiny things that evaporate into liquid. For example if you have some tea and you want to put sugar in it , the sugar evaporates into little tiny molecules and spread around the cup of tea.

  • Aaminah says:

    Chemical reactions

    A chemical reaction is were one or more things get changed into something a bit different . For example a cake makes a chemical reaction by rising in the oven . Fireworks make chemical reactions too by the firework launcher getting lit and then exploding into the air to make a new product – fireworks.

  • Matthew says:

    Did you know that chemicals are very dangerous because you can die

    • Miss Shaw says:

      You’re right Matthew, you need to be careful using some chemicals. Others are good for us though, and we need them to survive! Can you find any chemicals that are not harmful?

  • Matthew says:

    And the guy who des covered Gravity was called Isac newton because he was writing under a tree and an apple fell on his head and that is how he des covered gravity.

  • Maryam says:

    Not all physical changes are reversible. An example of a reversible change is melted ice turns into water and the water can be frozen back into ice. A irriversible change is like when you cook an egg, you can’t make it raw again. Also if you burn wood, it turns into ashes. The ashes cannot be turned back into wood.

  • Mason says:

    Albert Einstein

    Albert Einstein was born in 1879 in Germany. He grew to be one of the most famous and clever scientist that had ever lived.

  • Joseph says:

    At my house we have been doing some science experiments on irreversible and reversible effects on custard and jelly.

  • Ethan says:

    I have a science book at my house and it shows you lots of things to make about science.It is basically a book that teaches you how to make science stuff.

  • Declan says:

    Science is (from the Latin word Scientia, meaning “knowledge”) is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
    Solids, liquids and gases are all made out of particles. Sometimes the particles are just single atoms, and at other times the particles are collections of atoms called molecules. Whatever they are made out of, these particles are always moving.
    Even the particles in a solid move around but not much.The particles that make up the solid are always vibrating from side to side and up and down. If you give a solid some energy then the particles will move around a little bit more. This is what happens when you heat up a solid piece of wax – give it too much heat and the solid wax will turn into a liquid (or melt).
    Liquids are also made out of particles and these particles also have bonds between them. However the bonds that hold liquid particles together are much weaker than those in solids.The particles in a liquid are always moving but they move around a lot more than in a solid.
    If you look at gas particles you see that they move around much more than for those in solids or liquids. You might also notice that the distances between the particles in a gas are bigger than in the other two states: in other words the particles in a solid are closest together; and in a gas the particles are furthest apart.
    The particles in a gas are able to flow. They also move all around the container – bouncing off the top, bottom and side walls in equal numbers. It is this bouncing off the walls that causes a gas to exert pressure (like the pressure exerted by the bubbles of gas in a can of lemonade).

  • Aaminah says:

    Reversible and Irreversible changes

    Reversible changes are changes that can be undone. They are known as physical changes. Some examples include :
    Chocolate as it can be melted and then put in the fridge to make it chocolate again.

    Irreversible changes are changes that cannot be undone. They are known as chemical changes. Some examples include :
    A fried egg because you cannot un-frie an egg and put it back in it’s shell. Also burning wood is one because burning wood (ash) cannot turn back into wood again.

  • Aaminah says:

    Solids , Liquids and Gases

    Solids , Liquids and Gases can actually turn into each other. A Solid can turn into liquid. For example ice ( a Solid ) can be melted to turn into water ( a Liquid ). Or water can be put in a freezer to turn into ice. A Solid can turn into a Gas or a Gas into Solid but this is a very rare process. Dry Ice is one because as soon as you open the lid it turns into a Gas.

  • Matthew says:

    25 elements are essential to life. Four of these – carbon,oxygen,hydrogen and nitrogen make up approximately 96% of the human body, and they can be harmful in one way.

  • Aaminah says:


    Dissolving is different to melting as it uses a solid and a liquid. It is caused when – for example – you put sugar in tea because that sugar’s particles spread in between the particles of tea.


    Melting is completely different from dissolving as it only includes a solid. The solid melts into the same substance, but a different form.

  • Ahmed says:

    Albert Ainstein is a really famous scientist . He was born 1879 in Germany. People think of him as the most cleverest man in the world. Albert Ainstein died in1955.

  • Harry WR says:

    Every time you eat your body uses chemical reactions to break down your food into energy to provide your body with energy when you create a chemical reaction it often makes a new solution like a gas or a solid or a liquid but you have to be careful with chemical reactions because some are bad for your body but some are good.

  • Ethan says:

    At school we learnt what irreversible changes are and what reversible changes are. an irreversible change is when you can’t put it back to how it was before like if you put cake mixture in the oven it will turn to a cake but you can’t change it back to how it was before you put it in the oven. A reversible change is when you melt it and then you can harden it again to make it look like it did before like chocolate because if you melt chocolate you can put it in the freezer to harden it like the chocolate was before you melted it.

  • Amelia says:

    Irreversible changes are when you can’t change something back. In an irreversible change new materials are always formed.
    Heating can cause an irreversible change. For example, If you get a raw egg and cook it, you can’t change it back to a raw egg.
    Mixing substances can cause an irreversible change. For example if you mix vinegar and bicarbonate soda it’s make a bubbly mixture. So you can not get the bicarbonate soda and vinegar back to what they originally were.
    Burning is a irreversible change. When you burn wood it makes smoke sand ash, smoke and ash can’t be turned back into wood.

  • Harry WR says:

    An irreversible change is were you mix two solutions together to make a new solution but you cant get the two solutions back.

    reversible change is were you make a solution with a liquid and a solid and you can get the liquid and the solid back unlike the irreversible change it is like the opposite.

  • Aaminah says:


    Mixtures can be separated by many different things. One of the names decanting. Decanting is where you have two materials were one is more density than the other. For example oil and water can be separated by decanting as the less dense will come and float on the top.

  • Lexi says:

    Evaporation and condensation
    If you want to separate a solution you find a warn spot and leave it there. The water will evaporate and the solid will be left at the bottom.

    You can use a magnet to pick all of the magnetic bits so the non magnetic bits will be left.

    If you want to separate a liquid and a solid you can put them in filtering paper and the solid will get stuck but the liquid will go through easily.

  • Adam says:

    Albert Einstein was the most famous scientist of the 20th century. He was half German and half Swiss. His most famous equation was E=mc2. (Energy equals mass speed of light squared.) Einstein had 2 wives. His second wife was also his first cousin.

  • Aaminah says:

    Spencer Silver was a chemical scientist who lived in America. He is famous for inventing the low adhesive ( not very sticky ) , insoluble glue that is used to make Post it Notes. He did this by using microspheres ( tiny bubbles ) , which stopped the glue from bonding firmly to itself.

  • Oliver B says:

    In year five i have learnt a lot of new things like how to separate solids from liquids but most of all i have loved being in year five and i loved having you miss Shaw as my teacher.Although i will love going into year six i will miss being in year five,so thank you miss Shaw for being a wonderful teacher.

  • Aaminah says:

    I’ve also loved being in year 5 as it has been the best experience ever! I will love going into year 6 and am excited about the fun opportunity’s it has to offer , but will miss you Miss Shaw and I will miss all the things we have done in year 5. One of my favourite things that we did was going to Jodrell Bank and learning more about the fascinating wonders of Space. Overall I will miss year 5 sooooooo much.

Leave a Reply