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GCSE Combined Science practice questions

Practice questions with answers for every Combined Science topic on Yumio. Each set has extra questions with working shown and quick checks with options.

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Biology

Grade 3 Cell structure and specialised cells
10 questions, 28 checks. Starts: Which part of a bacterial cell is used for...
Grade 4 Blood
8 questions, 23 checks. Starts: Which part of blood carries urea to the kidneys?
Grade 4 Chromosomes, mitosis and the cell cycle
10 questions, 29 checks. Starts: Which stage of the cell cycle happens just before...
Grade 4 Communities, adaptations and interdependence
8 questions, 26 checks. Starts: A polar bear has thick fur. What type of...
Grade 4 Diffusion and exchange surfaces
8 questions, 24 checks. Starts: Does a larger organism have a larger or smaller...
Grade 4 Homeostasis, the nervous system and reflexes
8 questions, 22 checks. Starts: Which neurone in a reflex arc is found within...
Grade 4 Maths skills for biology
9 questions, 24 checks. Starts: Two heterozygous parents (Cc) have a child. What is...
Grade 4 Microscopes and magnification
8 questions, 27 checks. Starts: Change 0.25 mm into micrometres.
Grade 4 Pathogens and communicable disease
10 questions, 29 checks. Starts: Give one way of reducing the spread of malaria.
Grade 4 The digestive system and food tests
10 questions, 29 checks. Starts: What does amylase break starch down into?
Grade 5 Active transport
8 questions, 24 checks. Starts: Active transport moves particles from a low concentration to...
Grade 5 Biodiversity and human impact on the environment
8 questions, 24 checks. Starts: Name one way of protecting biodiversity.
Grade 5 Classification and evolutionary trees
8 questions, 24 checks. Starts: Which domain contains plants and animals?
Grade 5 Decay, the carbon cycle and the water cycle
7 questions, 21 checks. Starts: What substance is formed from decayed plant matter and...
Grade 5 Defence against disease and vaccination
8 questions, 26 checks. Starts: What does a vaccine contain: live pathogen, antibodies, or...
Grade 5 Enzymes
9 questions, 28 checks. Starts: What is the approximate optimum temperature of a human...
Grade 5 Exchange surfaces and gas exchange in the lungs
8 questions, 22 checks. Starts: Name the airways that lead from the windpipe to...
Grade 5 Fieldwork: quadrats, transects and population estimates
8 questions, 24 checks. Starts: A 1 m² quadrat has 25% of its squares...
Grade 5 Food chains, trophic levels and biomass transfer
8 questions, 26 checks. Starts: Producers have 1000 kg of biomass and primary consumers...
Grade 5 Growth, differentiation and percentile charts
8 questions, 24 checks. Starts: Which cells in an embryo can become any type...
Grade 5 Health, disease and risk factors
8 questions, 26 checks. Starts: Is a correlation proof of a cause? Answer yes...
Grade 5 Osmosis
8 questions, 26 checks. Starts: A potato cylinder is placed in pure water. Does...
Grade 5 Parasites, mutualism and the nitrogen cycle
8 questions, 24 checks. Starts: What process do plant roots use to take nitrates...
Grade 5 Photosynthesis and limiting factors
8 questions, 24 checks. Starts: Plants make cellulose from glucose. What is cellulose used...
Grade 5 Plant disease and plant defences
8 questions, 23 checks. Starts: Which process is reduced when a plant has damaged...
Grade 5 Plant tissues, organs and translocation
8 questions, 22 checks. Starts: Which leaf layer has air spaces to let gases...
Grade 5 Required practicals and working scientifically in biology
8 questions, 24 checks. Starts: Three reaction times are 0.20 s, 0.24 s and...
Grade 5 Respiration, exercise and metabolism
8 questions, 23 checks. Starts: Where is the lactic acid broken down after exercise?
Grade 5 Sexual and asexual reproduction and meiosis
9 questions, 27 checks. Starts: How many gametes does one cell make by meiosis?
Grade 5 Stem cells and differentiation
8 questions, 23 checks. Starts: Give one risk of using stem cells to treat...
Grade 5 The heart and blood vessels
9 questions, 27 checks. Starts: In which chamber does the blood from the vena...
Grade 6 Antibiotics, painkillers and drug testing
8 questions, 24 checks. Starts: What kind of drug treats the symptoms of a...
Grade 6 Evidence for human evolution
8 questions, 24 checks. Starts: Which country is Lake Turkana in, where Richard Leakey's...
Grade 6 Hormones and blood glucose control
8 questions, 25 checks. Starts: Which gland is called the master gland?
Grade 6 Inheritance: genetic crosses, sex and inherited disorders
9 questions, 28 checks. Starts: Give the percentage chance of a baby being a...
Grade 6 Plant hormones and tropisms
8 questions, 23 checks. Starts: What does a high concentration of auxin do to...
Grade 6 Puberty, the menstrual cycle and contraception
9 questions, 27 checks. Starts: The pill contains oestrogen and progesterone. Which hormone does...
Grade 6 Selective breeding and genetic engineering
4 questions, 21 checks. Starts: What is the term for all the different alleles...
Grade 6 The brain and the eye
8 questions, 24 checks. Starts: Name the muscles that change the shape of the...
Grade 6 Transpiration and stomata
8 questions, 23 checks. Starts: A bubble moves 75 mm in 5 minutes. Calculate...
Grade 6 Variation, natural selection and evidence for evolution
8 questions, 26 checks. Starts: Name one cause of extinction.
Grade 6 Water balance, kidneys and temperature control
8 questions, 26 checks. Starts: When the body is too hot, do the blood...
Grade 7 DNA, the genome and mutations
7 questions, 19 checks. Starts: Where in the cell are proteins made?
Grade 7 Monoclonal antibodies
8 questions, 25 checks. Starts: Why are monoclonal antibodies specific to one antigen? Give...

Chemistry

Grade 3 Atoms, compounds, mixtures and equations
8 questions, 25 checks. Starts: Which method gets pure water from salt water?
Grade 3 The periodic table and electronic structure
8 questions, 26 checks. Starts: An element has the electronic structure 2,8,1. Give its...
Grade 4 Acids, bases and making salts
10 questions, 28 checks. Starts: Balance the equation: HCl + CaCO₃ → CaCl₂ +...
Grade 4 Atomic structure, isotopes and models of the atom
9 questions, 27 checks. Starts: How many electrons are in a calcium ion, Ca²⁺?...
Grade 4 Earth's resources, potable water and waste water
8 questions, 24 checks. Starts: In sewage treatment, which stage lets solids settle to...
Grade 4 Ionic bonding and ionic compounds
9 questions, 27 checks. Starts: How many electrons does a sulfur atom gain to...
Grade 4 Maths skills for chemistry
7 questions, 23 checks. Starts: Three results are 12.1, 12.3 and 12.2 cm³. Calculate...
Grade 4 Metallic bonding and states of matter
8 questions, 25 checks. Starts: Name the change of state when ice turns directly...
Grade 4 Purity, formulations and chromatography
8 questions, 24 checks. Starts: What name is given to a mixture designed as...
Grade 4 Relative formula mass and conservation of mass
8 questions, 24 checks. Starts: 9.7 g of zinc oxide is made when 7.8...
Grade 4 Tests for gases
8 questions, 24 checks. Starts: Hydrogen peroxide is broken down using manganese dioxide. The...
Grade 4 The Earth's atmosphere, past and present
8 questions, 24 checks. Starts: A 250 cm³ sample of air is about 20%...
Grade 5 Corrosion, alloys and materials
8 questions, 24 checks. Starts: Which two elements are in bronze?
Grade 5 Covalent bonding and giant covalent structures
9 questions, 29 checks. Starts: State why methane has a low boiling point.
Grade 5 Crude oil, hydrocarbons and cracking
9 questions, 29 checks. Starts: Name the two types of product made when a...
Grade 5 Exothermic and endothermic reactions
8 questions, 26 checks. Starts: On a reaction profile, what is shown by the...
Grade 5 Greenhouse gases, climate change and air pollution
8 questions, 24 checks. Starts: Melting ice caps and warming oceans cause which change...
Grade 5 Groups 0, 1 and 7
9 questions, 28 checks. Starts: Balance the equation: K + H₂O → KOH +...
Grade 5 Life cycle assessments, recycling and getting metals sustainably
8 questions, 24 checks. Starts: A paper bag needs 1.5 MJ to make. It...
Grade 5 Rates of reaction and catalysts
8 questions, 25 checks. Starts: Give two ways to make a reaction between a...
Grade 5 Reactivity series and extracting metals
8 questions, 26 checks. Starts: Copper is added to magnesium sulfate solution. What happens?
Grade 5 Required practicals and working scientifically in chemistry
8 questions, 24 checks. Starts: Copper sulfate solution is electrolysed with inert electrodes. Which...
Grade 5 Transition metals
8 questions, 24 checks. Starts: Why is iron often coated with zinc?
Grade 6 Chemical cells and fuel cells
8 questions, 25 checks. Starts: Give one reason why a rechargeable battery is not...
Grade 6 Concentration and limiting reactants
10 questions, 25 checks. Starts: Calculate the concentration in g/dm³ when 3.0 g of...
Grade 6 Electrolysis
8 questions, 27 checks. Starts: Name the gas made at the anode when sodium...
Grade 6 Electrolysis of aqueous solutions
10 questions, 25 checks. Starts: Dilute sulfuric acid is electrolysed using inert electrodes. 18...
Grade 6 Empirical formulae and percentage composition
8 questions, 24 checks. Starts: A compound contains 1.2 g of carbon and 0.4...
Grade 6 Nanoparticles
8 questions, 23 checks. Starts: Convert 50 nm into metres in standard form.
Grade 6 Percentage yield and atom economy
10 questions, 25 checks. Starts: Calculate the atom economy for iron in Fe₂O₃ +...
Grade 6 Reversible reactions and equilibrium
10 questions, 26 checks. Starts: The forward reaction is endothermic. What happens to the...
Grade 6 The Haber process and fertilisers
8 questions, 24 checks. Starts: How is ammonia separated from the unreacted gases?
Grade 7 Alkenes, alcohols and carboxylic acids
8 questions, 27 checks. Starts: Name the ester made from ethanol and ethanoic acid.
Grade 7 Equilibrium: predicting shifts and the Haber compromise
8 questions, 24 checks. Starts: H₂ + I₂ ⇌ 2HI has the same number...
Grade 7 Extracting metals by electrolysis
11 questions, 24 checks. Starts: Explain why aluminium oxide must be molten for electrolysis.
Grade 7 Gas volumes
8 questions, 24 checks. Starts: In 2H₂ + O₂ → 2H₂O, what volume of...
Grade 7 pH, strong acids and weak acids
8 questions, 25 checks. Starts: Write the equation for hydrochloric acid ionising in water.
Grade 7 Polymers
8 questions, 28 checks. Starts: What is the name for a polymer that softens...
Grade 7 The mole and reacting masses
11 questions, 26 checks. Starts: In 2Mg + O₂ → 2MgO, 12 g of...
Grade 8 Exam calculations: moles, solutions, titration and yield
11 questions, 24 checks. Starts: Hydrogen can be made by CH₄ + 2H₂O →...
Grade 8 Titrations and their calculations
10 questions, 25 checks. Starts: 25.0 cm³ of 0.100 mol/dm³ NaOH needs 20.0 cm³...

Physics

Grade 4 Key ideas: units, vectors and equations
4 questions, 24 checks. Starts: Convert 0.35 A to milliamperes.
Grade 5 Atomic structure
6 questions, 41 checks. Starts: Leila measures a count rate of 112 counts per...
Grade 5 Density and thermal insulation practicals
4 questions, 21 checks. Starts: A cuboid has a mass of 0.60 kg and...
Grade 5 Energy stores and transfers
5 questions, 39 checks. Starts: Aisha tests a motor. The useful energy is 250...
Grade 5 Forces
5 questions, 39 checks. Starts: A trolley of mass 7 kg accelerates at 3...
Grade 5 Forces and elasticity
5 questions, 25 checks. Starts: A spring with a spring constant of 50 N/m...
Grade 5 Magnetism
6 questions, 40 checks. Starts: A transformer has 140 turns on the primary coil...
Grade 5 Motion, forces and stopping
10 questions, 38 checks. Starts: A car starts from rest and accelerates at 2...
Grade 5 Particle model of matter
4 questions, 37 checks. Starts: Work out the energy needed to make 2 kg...
Grade 5 Required practicals and working scientifically
4 questions, 24 checks. Starts: In a ripple tank 12 waves pass a point...
Grade 5 Series and parallel circuits
5 questions, 48 checks. Starts: A 6.0 V battery is connected to a 12...
Grade 5 The electromagnetic spectrum
4 questions, 22 checks. Starts: Higher tier. A mobile phone signal has a frequency...
Grade 5 Waves
6 questions, 45 checks. Starts: A boat sends a pulse of ultrasound to the...
Grade 6 Black body radiation
4 questions, 24 checks. Starts: Explain why the temperature of the Earth stays roughly...
Grade 6 Lenses
4 questions, 24 checks. Starts: An image is 15 cm high and the magnification...
Grade 6 Moments, levers and gears
4 questions, 24 checks. Starts: A 50 N effort pushes down 0.8 m from...
Grade 6 Nuclear fission and fusion
4 questions, 24 checks. Starts: Explain why the chain reaction in a reactor must...
Grade 6 Pressure in fluids
4 questions, 24 checks. Starts: The pressure caused by water is 45 000 Pa....
Grade 6 Reflection, ultrasound and seismic waves
4 questions, 24 checks. Starts: Explain why S waves are not detected on the...
Grade 6 Space physics
4 questions, 24 checks. Starts: Satellite X orbits closer to the Earth than satellite...
Grade 6 Static electricity
4 questions, 24 checks. Starts: Explain why an aircraft is connected to earth with...
Grade 7 Electromagnetic induction and transformers
4 questions, 21 checks. Starts: Higher tier. A transformer has 400 turns on the...
Grade 7 Gas pressure and volume
4 questions, 24 checks. Starts: A gas at 300 kPa has a volume of...
Grade 7 Loudspeakers and microphones
4 questions, 24 checks. Starts: A loudspeaker is driven at 500 Hz. How many...
Grade 7 Momentum
4 questions, 24 checks. Starts: A 1000 kg cannon fires a 20 kg shell...

Also see the equations you must know and the key terms for Biology, Chemistry and Physics.

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