1.3
Relative Density, Expansion and Combustion
How materials behave under temperature and pressure changes
2.1
Intro to Water
Properties of water, the water cycle, and states of matter
2.3
Hard and Soft Water
Temporary and permanent hardness, limescale, and treatment
3.1
Corrosion and Properties of Materials
Electrolytic action, dezincification, and material selection
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Short Answer Quizzes
Test your written knowledge — AI-marked with personalised feedback
These four quizzes test whether you can explain scientific principles in your own words — including calculations, definitions, and real-world plumbing applications. Your written answers are marked by AI against the Unit 203 workbook, with feedback on what you got right and what to review.