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Edexcel IGCSE Physics Topic 5 - Solids, Liquids And Gases

Below is everything the examiners think you know, if you're not sure of something click on the link to watch my YouTube video explanation. For a copy of these you can print off, get the FREE revision guide I wrote for you.

• I can use and recall the equations and the units for this unit as shown in the equation sheet

• I can recall and use the equation linking density, mass and volume

• I can define density

• I can describe a practical investigation into density using measurements of mass and volume

• I can recall and use the equation linking pressure, force and area

• I can recall that pressure acts equally in all directions in a gas or a liquid at rest

• I can recall and use the equation linking pressure difference, height, density and gravitational field strength

• I can explain how a heating system works

• I can describe the energy changes that happen when a substance changes state

• I can describe a practical investigation of how to create a graph showing change of state using temperature and time measurements

• I can define ‘specific heat capacity’

• I can recall the units needed for ΔQ = mcΔT

• I can rearrange ΔQ = mcΔT

• I can use ΔQ = mcΔT

• I can describe a practical investigation into the specific heat capacity of materials

• I can describe and explain the motion of gas particles

• I can state that absolute zero is –273 °C

• I can explain why absolute zero is –273 °C

• I can describe absolute zero (–273 °C) as 0 Kelvin

• I can convert between the Kelvin and Celsius scales

• I can explain why increasing temperature results in gas particles moving faster

• I can state that the temperature in Kelvin of a gas is proportional to the average kinetic energy of its molecules

• I can use the equation linking the pressure and Kelvin temperature of a fixed mass of gas at constant volume

• I can relate the volume of a gas to the pressure

• I can use the equation linking the pressure and volume of a fixed mass of gas at constant temperature