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    Combined Science
    1SC0

    Edexcel GCSE Combined Science Equation Sheet (1SC0)

    Free Edexcel GCSE Combined Science equation sheet: open the official Edexcel (1SC0) PDF plus all 45 formulas listed by topic, showing which 44 you must memorise.

    45

    Formulas listed

    44

    You must memorise

    1

    Given in the exam

    Official Edexcel Physics Equations to Learn (1PH0)

    Official Edexcel PDF

    Open on Edexcel

    Periodic Table

    Given in the Chemistry exams — interactive version

    Open periodic table

    Physics

    23 formulas across 6 topics

    Forces

    Weight

    Memorise
    W=mgW = \text{mg}

    Work done

    Memorise
    W=FdW = \text{Fd}

    Force = mass × acceleration

    Memorise
    F=maF = \text{ma}

    Moment

    Memorise
    M=FdM = \text{Fd}

    Pressure

    Memorise
    P=FAP = \dfrac{F}{A}

    Hooke's law

    Memorise
    F=kxF = \text{kx}

    Motion

    Speed

    Memorise
    speed=distancetime\text{speed} = \dfrac{\text{distance}}{\text{time}}

    Acceleration

    Memorise
    a=v−uta = \dfrac{v - u}{t}

    SUVAT

    Given in exam
    v2=u2+2axv^2 = u^2 + 2\text{ax}

    Given on the equation sheet.

    Momentum

    Memorise
    p=mvp = \text{mv}

    Energy

    Kinetic energy

    Memorise
    KE=12mv2KE = \tfrac{1}{2}mv^2

    Gravitational PE

    Memorise
    GPE=mgh\text{GPE} = \text{mgh}

    Change in thermal energy

    Memorise
    ΔQ=mcΔθ\Delta Q = mc\Delta\theta

    Power

    Memorise
    P=Et=WtP = \dfrac{E}{t} = \dfrac{W}{t}

    Efficiency

    Memorise
    efficiency=useful energy outtotal energy in\text{efficiency} = \dfrac{\text{useful energy out}}{\text{total energy in}}

    Waves

    Wave speed

    Memorise
    v=fλv = f\lambda

    Period

    Memorise
    T=1fT = \dfrac{1}{f}

    Refractive index (Higher)

    Memorise
    n=sin⁡isin⁡rn = \dfrac{\sin i}{\sin r}

    Electricity

    Charge

    Memorise
    Q=ItQ = \text{It}

    Potential difference (Ohm's law)

    Memorise
    V=IRV = \text{IR}

    Electrical power

    Memorise
    P=VI=I2RP = \text{VI} = I^2R

    Energy transferred (electrical)

    Memorise
    E=IVt=QVE = \text{IVt} = \text{QV}

    Particles

    Density

    Memorise
    ρ=mV\rho = \dfrac{m}{V}

    Chemistry

    13 formulas across 7 topics

    Moles & Mass

    Number of moles

    Memorise
    n=massMrn = \dfrac{\text{mass}}{M_r}

    M_r = relative formula mass.

    Mass from moles

    Memorise
    mass=nMr\text{mass} = nM_r

    Avogadro's number

    Memorise
    number of particles=n×6.02×1023\text{number of particles} = n \times 6.02 \times 10^{23}

    Percentage by mass of an element

    Memorise
    % by mass=Ar×number of atomsMr×100\%\text{ by mass} = \dfrac{A_r \times \text{number of atoms}}{M_r} \times 100

    Solutions

    Concentration (g/dm³)

    Memorise
    concentration=massvolume\text{concentration} = \dfrac{\text{mass}}{\text{volume}}

    Volume in dm³ (1 dm³ = 1000 cm³).

    Concentration (mol/dm³)

    Memorise
    concentration=molesvolume\text{concentration} = \dfrac{\text{moles}}{\text{volume}}

    Gases

    Volume of a gas at RTP

    Memorise
    volume=24n\text{volume} = 24n

    RTP: 24 dm³ per mole.

    Yield & Economy

    Percentage yield

    Memorise
    % yield=actual masstheoretical mass×100\%\text{ yield} = \dfrac{\text{actual mass}}{\text{theoretical mass}} \times 100

    Atom economy

    Memorise
    % atom economy=Mr of desired producttotal Mr of products×100\%\text{ atom economy} = \dfrac{M_r\ \text{of desired product}}{\text{total }M_r\ \text{of products}} \times 100

    Energy Changes

    Energy change of a reaction (Higher)

    Memorise
    Q=mcΔTQ = mc\Delta T

    Used in calorimetry experiments.

    Rates

    Mean rate of reaction

    Memorise
    mean rate=quantity of reactant usedtime\text{mean rate} = \dfrac{\text{quantity of reactant used}}{\text{time}}

    Mean rate (product formed)

    Memorise
    mean rate=quantity of product formedtime\text{mean rate} = \dfrac{\text{quantity of product formed}}{\text{time}}

    Electrolysis

    Charge in electrolysis (Higher)

    Memorise
    Q=ItQ = \text{It}

    Biology

    9 formulas across 6 topics

    Cells

    Magnification

    Memorise
    magnification=image sizeactual size\text{magnification} = \dfrac{\text{image size}}{\text{actual size}}

    Real size from image

    Memorise
    actual size=image sizemagnification\text{actual size} = \dfrac{\text{image size}}{\text{magnification}}

    Surface area to volume ratio

    Memorise
    SA:V=surface areavolume\text{SA:V} = \dfrac{\text{surface area}}{\text{volume}}

    Health

    Body Mass Index (BMI)

    Memorise
    BMI=mass (kg)(height in m)2\text{BMI} = \dfrac{\text{mass (kg)}}{(\text{height in m})^2}

    Waist : hip ratio

    Memorise
    ratio=waist circumferencehip circumference\text{ratio} = \dfrac{\text{waist circumference}}{\text{hip circumference}}

    Circulation

    Cardiac output

    Memorise
    cardiac output=stroke volume×heart rate\text{cardiac output} = \text{stroke volume} \times \text{heart rate}

    Transport

    Percentage change in mass (osmosis practical)

    Memorise
    % change=final−initialinitial×100\%\text{ change} = \dfrac{\text{final} - \text{initial}}{\text{initial}} \times 100

    General

    Rate (general)

    Memorise
    rate=changetime\text{rate} = \dfrac{\text{change}}{\text{time}}

    Statistics

    Mean

    Memorise
    mean=sum of valuesnumber of values\text{mean} = \dfrac{\text{sum of values}}{\text{number of values}}
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