Yeast & Carbon dioxide

The purpose of any leavener is to produce the gas that makes bread rise. Yeast does this by feeding on the sugars in flour, and expelling carbon dioxide in the process.
While there are about 160 known species of yeast, Saccharomyces cerevisiae, commonly known as baker’s yeast, is the one most often used in the kitchen. Yeast is tiny: Just one gram holds about 25 billion cells. That amount of fungi can churn out a significant amount of carbon dioxide, provided it has the simple sugars it uses as food.

Rang a 5 had fun watching the yeast expelling carbon dioxide.

Classes involved: Rang a 5 Ms Joyce   



Senior infants explored the effects of washing their hands with an experiment. First they used a fresh piece of bread and put it into a bag. After they all handled a piece of bread and then put it in a bag and finally they washed their hands and handled another piece of bread. The results can be seen on the three pieces of bread.  


Classes involved: Senior Infants – Ms Brown / Ms Cotter

Raising frogs

Rang a 1 decided it would be fun to raise some frogs in our classroom. We set up a big fish tank and we were lucky enough to get some tadpoles. We have been watching them grow over the last few weeks. All of them have their back legs now and one of them had to be released today as he had turned into a proper frog and needs flies to eat! We learned that they are really fast swimmers and it is really interesting to watch them change.

Signs of Spring 


Rang a 1 took their digital camera and went around the school in search of some signs of Spring. They found buds growing on trees, daffodils and crocuses growing in the school garden and a bird building its nest.

Classes involved: Rang a 1 Ms O Toole

Lego Workshop

During science week we were very lucky to have a visit from Learnit’s Lego Workshop. 5th and 6th class took part in a machines and mechanisms workshop and the children thoroughly enjoyed it.

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Classes involved: 5th & 6th – Mr O Flaherty’s, Ms Sweeney’s & Ms Joyce’s

Seeds in a bag

We planted seeds in a bag to observe their growth. We used wet cotton wool in the bottom of the bag along with the seeds and then we stuck them to the window to get sunlight. We will be observing and measuring their progress as the weeks go by. We also put a seed (with water) in darkness to see what would happen and we put another seed in sunlight (without water).

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After two weeks we removed the seeds from the bag to observe their growth. Results are below:

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Classes involved: Rang a 1 – Ms O Toole

Composting with worms

We have decided to try to compost with tiger worms. We set up our composting bins and added the worms. We had to let them settle in before we added the food. They need a dry, warm place to stay alive and eat all our leftovers.

Classes involved: Rang a 1 – Ms O Toole



We made a wormery so that we could see the different paths made by worms. We used different layers and then gathered worms in the yard. We had to look in some dark places for the worms because they don’t like the light.

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Classes involved: Rang a 1 – Ms O Toole