Enzymes, Temperature and pH
Learn enzyme action and interpret temperature and pH results with three worked examples and 12 original questions.
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Choose a focused Cambridge IGCSE Biology, Chemistry or Physics topic. Each original guide pairs a printable PDF with a readable lesson, worked examples, 12 practice questions and explained answers.
These independent, AI-assisted guides cover selected topics for 2026–2028 exams. They have not been independently academically reviewed. Check important answers against your course materials and the current syllabus.
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Learn enzyme action and interpret temperature and pH results with three worked examples and 12 original questions.
Read lesson and open PDF →Follow water and sugars through plants and reason about transpiration with three worked examples and 12 original questions.
Read lesson and open PDF →Work through alleles, genotype and simple monohybrid crosses with three examples and 12 original explained questions.
Read lesson and open PDF →Read a guide, try the questions, then check your answers.
Understand solids, liquids, gases and diffusion with particle explanations, three worked examples and 12 original questions with explained answers.
Read lesson and open PDF →Practise proton, neutron and electron counts, shell arrangements and isotope averages with three worked examples and 12 original questions with explained answers.
Read lesson and open PDF →Learn atom counting, charge-balanced formulae, balanced equations and relative formula mass through three worked examples and 12 original questions with explained answers.
Read lesson and open PDF →Read a guide, try the questions, then check your answers.
Learn speed, acceleration and motion graphs through worked calculations and 12 original questions with explained answers.
Read lesson and open PDF →Connect energy transfers to work, power and efficiency with three worked examples and 12 original questions.
Read lesson and open PDF →Understand current, potential difference and series or parallel circuits with three worked examples and 12 original questions.
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