GCSE Combined Science
Required Practicals
96 questions17 subtopicsAQAEdexcelEduqasOCRWJEC
What's covered
Food tests7
Microscopy7
Osmosis in plant tissue7
Electrolysis6
I-V characteristics6
Microbiology — antiseptics and antibiotics6
Photosynthesis rate6
Rates of reaction6
Titration6
Hooke's Law5
Making soluble salts5
Paper chromatography5
Refraction of light5
Specific heat capacity5
Temperature change (calorimetry)5
Waves5
Resistance in circuits4
Sample questions
A taste of the 96 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
1Electrolysis
What happens at the cathode during electrolysis?
- •Negative ions are attracted and gain electrons
- •Oxidation — negative ions lose electrons
- •Positive ions are repelled away from the electrode
- ✓Reduction — positive ions gain electrons to form atoms
2Food tests
What does Benedict's reagent test for?
- •lipids (fats and oils)
- •proteins
- ✓reducing sugars
- •starch
3Hooke's Law
State Hooke's Law.
- •Extension increases by a constant amount for each unit of force
- ✓Extension is directly proportional to force, up to the elastic limit
- •Force and extension are inversely proportional at all loads
- •Force is directly proportional to the square of the extension
4I-V characteristics
What does an I-V characteristics practical investigate?
- •charge vs time relationship
- ✓current vs voltage relationship
- •power vs current relationship
- •resistance vs temperature relationship
5Making soluble salts
What is the first step when making a pure salt from an acid and an insoluble metal oxide?
- ✓Add excess solid metal oxide to the acid until no more dissolves
- •Add the acid to the solid until the solid disappears
- •Add water to dilute the acid before adding the solid
- •Heat the acid until it evaporates
6Microbiology — antiseptics and antibiotics
What is aseptic technique?
- •identifies the type of bacteria present
- •kills all bacteria on an agar plate
- •measures the growth rate of bacteria
- ✓prevents contamination of cultures
Try it for four weeks. Free.
One school. Unlimited classes. No card limit. No teacher limit. If your students aren't practising daily by the end of the trial, you owe us nothing.
More GCSE Combined Science topics
ForcesEcologyElectricityWavesQuantitative ChemistryInheritance, Variation & EvolutionOrganisationEnergyAtomic Structure and the Periodic TableChemical ChangesMagnetism and ElectromagnetismBonding, Structure and the Properties of MatterInfection & ResponseParticle Model of MatterHomeostasis & ResponseCell BiologyOrganic ChemistryUsing ResourcesChemistry of the AtmosphereAtomic StructureChemical AnalysisRate and Extent of Chemical ChangeEnergy ChangesWorking ScientificallyBioenergetics