English National Curriculum - Science

Key Stage 3: Which mixture makes the best bubble?

Mission Objectives

Plan a fair test by identifying variables and writing a clear hypothesis

Carry out a fair test safely and record accurate, repeatable results

Analyse results to draw conclusions and evaluate reliability

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Keywords

Words and meanings to learn

mixture

a combination of two or more substances that are not chemically joined and can be separated

investigate

to carry out a careful study or experiment to discover or learn something

bubble

a thin sphere of liquid enclosing a gas

curiosity

a strong desire to learn, explore or discover new things

fair test

an experiment in which only one variable is changed at a time while all other variables are kept the same

This lesson has been written by

Samantha Batch

Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.

Underpinning this is a strong foundation in applied science built across a range of industry roles. Samantha has held scientific roles at John Smith's Brewery, Yorkshire Water and WasteCare, where she led technical projects, drove operational efficiencies and ensured compliance with industry standards. Across these roles she has first-hand experience of how scientific knowledge translates into measurable outcomes in professional and commercial environments.

In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket. 

Required Resources

  • Washing-up liquid (different brands)
  • Glycerine and sugar
  • Water
  • Measuring jugs/spoons
  • Mixing containers
  • Bubble wands (pipe cleaners/straws)
  • Stopwatches
  • Handouts (core & support)
  • Graph paper or laptops/tablets for data plotting

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