Paper 6 asks about experiments you only see on the page: reading instruments, describing a method, naming apparatus and planning a fair test. These pages cover the experiments that keep coming back. In each one, watch the set-up assembled step by step with the variables and the graph beside it, build it yourself on a bench, then check the wording the examiners want.
Starch and amylase in a water bath, a drop tested with iodine every 30 s until it stays orange-brown.
RespirationYeast and glucose in a water bath, carbon dioxide collected or bubbles counted, temperature or glucose varied.
OsmosisPotato pieces cut to the same size, blotted, weighed, left in salt solutions, then reweighed.
DiffusionAgar cubes with an indicator in acid, timing the colour change, with surface area or concentration varied.
Biological moleculesBenedict's in a water bath, iodine, biuret and DCPIP: the reagent, the method and the positive colour.
PhotosynthesisPondweed in a test-tube, a lamp at measured distances, bubbles counted and the temperature kept constant.
HomeostasisTest-tubes of hot water as model animals, thermometers, huddled or apart, readings at set times.
We read every 0610 Paper 6 from 2023 to 2025 and grouped the questions by the apparatus they use. Each page is an original experiment in the style of its family, and every step carries what the Cambridge examiner reports said students got wrong.
Next: practise in the investigations trainer. The experiments and wording on these pages are our own.