Primary 4/5 classroom becomes a shipyard

This afternoon, Primary 4/5 were very busy designing  ‘unsinkable’ boats.  We were each given a 2l bottle (boat), 2 bottle ends (bulk heads) and enough weights to half submerge our boat in the water. We had to work together in our groups to find the best place for our watertight compartments and the best distribuation of weight.


Every group had to ensure that their boat was level in the water with the bottle top half submerged.  When our hull was breached (bottle lid removed), we used ipads to time how long it took our ship to sink.  Our results showed that ships sink faster with no bulkheads.  We also discovered that if the there were too many weights at one end of the boat, it caused our breaced hull to rise above the water level giving us false results.

One group discovered that placing the bulkheads at either end of the ship with the weight evenly distributed was the most effective in allowing our boat to stay afloat.


Rainbow Science with Primary 4/5

This afternoon we were conducting a very exciting science experiment.  We used milk, food colouring and washing up liquid.

Firstly, we poured some milk into a bowl. We then added 3 drops of red, yellow, blue and green food colouring. Next, we got a cotton bud, dipped it into washing up liquid, then gently touched the milk with the cotton bud. It created a ‘colourful tornado.’

Some of the adjectives we used to describe the effect were: ‘extraordinary’ (Thomas), ‘scientific’ (Cuan), ‘a burst of rainbow colours’ (Millie), tie-dye (Riley and Sophie).

Come and visit us on Monday night at 7 pm to see it for yourself!

P5G STEM Cornflour Slime

Yesterday (Tuesday 21st March) Primary 5 had a wonderful science STEM day and made cornflour slime. The children all enjoyed getting involved with the experiments and trying things out and following the instructions to make new things and to show changes in colour and changes in state.

Cornflour slime

The children found it quite tricky to mix the cornflour and water and had to work hard to combine the two using lots of muscle power.

Eventually, when the consistency was correct the pupils chose their preferred colour for the slime.



  • adding a little water didn’t work well and we had to add more
  • cornflour and water mix to create a substance that is hard when you tap it and turns runny when you handle it.
  • it looked gooey and squishy
  • was hard to mix food colouring



Primary 5 had a fabulous day today conducting a variety of experiments in class related to changes.

They looked at colour change and change in state.

3 experiments included:

  • fizzy colours
  • paper towel colour mixing
  • cornflour slime.

The children completed science reports on each and came up with their predicitons for each experiment before conducting it.


The children had an excellent time participating in these experiments and worked together in small groups sharing ideas.

They then came up with their findings and conclusions for their reports.

Fizzy colours


  • when the vinegar was added to the food colouring it made it go lighter
  • paintbrushes didn’t work for adding the vinegar to bicarbonate of soda so we poured small amounts in.
  • when the vinegar interacted with the bicarbonate of soda it erupted, puffed up, got bigger and fizzed up.
  • we learned that it gave off a gas and that this gas was carbon dioxide.
  • bicarbonate of soda = alkali
  • vinegar = acid.


Paper Towel Colour Mixing


  • the food colouring became lighter when water was mixed with it.
  • the paper towel became soggy when inserted into coloured water
  • water travelled up the paper towel because the paper towel soaked it up (absorbed it)
  • the coloured water began to mix when they both moved up the paper towel to create the colour purple.


Tomorrow the children will finish their report on Cornflour slime and reflect on their findings.

Photos to follow of these fab experiments.

Fair to say that the children enjoyed their science day and will hopefully have more science experiments to report on.


Floating and sinking with Primary 4/5

Primary 4/5 became scientists for the afternoon.  We were experimenting with an orange and a grape to see if they would float or sink.

A lot of us thought the orange would sink because it was heavier than the grape.  Imagine our surprise when our experiment showed it was the other way round.

Mrs Haigh (Emma’s mum) spoke to us about density and why the orange floats even though it’s heavier.  Did you know that the orange peel contains little air pockets that make it less dense than water?  This is why it floats.

We tested this theory by peeling the orange…it sank!


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