No-blow Balloons

Room 11 and 16 have been exploring different scientific reactions using common elements (gases, liquids and solids).

Learning in science is important to understanding the world in which we live.  It sparks curiosity and leads to questioning, exploring, testing, observing and discovering.

This scientific experiment involved baking soda and vinegar.

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First, we talked about what happens when we mix vinegar and baking soda together.  Lots of children had already experienced this reaction and knew they would see ‘fizzing’ and ‘bubbles’.

We did this at my kindy in a volcano.  It was fizzing! – Jacob

We made a rocket go up into the air. It exploded! – Sam

Next, we talked about how we could inflate a balloon without blowing it up with our mouths?

With a machine. – Hunter

With a bike pump. – Jacob

I asked the children if vinegar and baking soda could help us blow the balloon up. After lots of discussion, we decided that the ‘fizzing’ and ‘bubbles’ would go into the balloon and blow it up. Sam talked about the ‘gas’ going into the balloon.

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Next, each group did this experiment (with Mrs Griffin holding the bottle).    

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The balloon is getting hard. – Ihaka

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The balloon’s getting cold. It’s cold. It’s cold. It’s cold! – Ryleigh & Reid

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It’s already blowing up! – Alyssa

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It’s blowing up! – Violet

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Tapping into the children’s prior knowledge of mixing baking soda with vinegar prior to starting, connected the children to the lesson.

Participating actively in these experiments engaged the children’s interest and made the lesson more meaningful and stimulating.  Being directly involved in tipping the baking soda into the vinegar and shaking it, gave the children some control and ownership of the experiment.  There were lots of captivated faces and excited voices when the balloon was expanding.

New Zealand Curriculum:

Material world - Properties and changes of matter

Students will observe, describe, and compare physical and chemical properties of common materials and changes that occur when materials are mixed, heated, or cooled.

Key Competencies:

Thinking– thinking critically to make sense of new information

Participating and Contributing – taking part and being activity involved

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Keywords: Science, Reactions, Baking Soda, Vinegar, Balloons

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