/edexcel/questions","basePath":"/gcse/physics/edexcel/density-and-states-of-matter/questions","formulaUrl":null,"initialIndex":67,"initialQuestionWindow":[{"id":"d2200416-0225-408e-b5b1-9cd48a2a1535","revisionId":"c4c69504-5597-4afb-a909-74cc1c3cce1d","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"688270b8-3f0c-405e-b8cd-c533485a43c3","label":null,"content":"Describe, in terms of particles, **two** differences between a liquid and a gas of the same substance.","markscheme":"- Identifies a first correct contrasting difference in particle **arrangement/spacing** (e.g. liquid particles are closely packed/touching, whereas gas particles are far apart with large gaps) B1\n- Identifies a second correct contrasting difference in particle **movement** or **forces/energy** (e.g. liquid particles can slide or flow past each other, whereas gas particles move randomly at high speeds; or forces of attraction are stronger in a liquid than in a gas; or gas particles have more kinetic energy than liquid particles) B1","marks":2,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"particle_comparison","label":"Compare the particles","steps":[{"type":"text","order":0,"title":"Compare the spacing","content":"Write one direct contrast about how the particles are arranged:\n\nLiquid particles are closely packed or touching, whereas gas particles are far apart with large gaps.\n\nArrangement/spacing: B1","highlights":[{"text":"in terms of particles","location":"specification"}]},{"type":"text","order":1,"title":"Compare particle movement","content":"Liquid particles can slide or flow past one another, whereas gas particles move randomly at high speeds.\n\nMovement: B1","highlights":[{"text":"**two**","location":"specification"}]}]}],"generatedAt":"2026-07-22T11:43:38.675Z","modelVersion":"gpt-5.6-terra+diagrams-1","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"d6dc6427-1d93-44a9-ad8b-8fe1e6c19ae5","revisionId":"1b0d8e42-a89e-42b3-ba7c-8cbfe4afc26a","questionNumber":null,"questionType":"LA","specification":"A small metal sample has a mass of $6.45 \\times 10^{-2}\\text{ kg}$ and a volume of $7.50 \\times 10^{-6}\\text{ m}^3$.","difficulty":4,"difficultyBand":"easy","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"64d37cbe-2a7c-49ae-ba7f-3bd8c620e566","label":null,"content":"Calculate the density, $\\rho$, of the metal sample.\n\nUse the equation:\n\n$$\\rho = \\frac{m}{V}$$\n\nState the unit.","markscheme":"- Substitutes the values into the density equation: $\\rho = \\frac{6.45 \\times 10^{-2}}{7.50 \\times 10^{-6}}$ M1\n- Calculates the density as $8600$ (or $8.6 \\times 10^3$) A1\n- States the correct unit of density: $\\text{kg/m}^3$ (or $\\text{kg}\\text{ m}^{-3}$) B1","marks":3,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"density_calculation","label":"Use the density equation","steps":[{"type":"text","order":0,"title":"Identify the quantities","content":"The mass is already in kilograms and the volume is already in cubic metres, so no unit conversion is needed. Use the given density equation, where $m$ is mass and $V$ is volume.","highlights":[{"text":"mass of $6.45 \\times 10^{-2}\\text{ kg}$","location":"specification"},{"text":"volume of $7.50 \\times 10^{-6}\\text{ m}^3$","location":"specification"},{"text":"$$$\\rho = \\frac{m}{V}$$","location":"specification"}]},{"type":"hyper_latex","block":{"nodes":[{"latex":"\\rho=\\frac{\\htmlData{anchor=mass}{6.45\\times10^{-2}}}{\\htmlData{anchor=volume}{7.50\\times10^{-6}}}"},{"latex":"\\rho=\\left(\\frac{6.45}{7.50}\\right)\\times10^{-2-(-6)}"},{"latex":"\\rho=0.86\\times10^{4}"},{"latex":"\\rho=\\htmlData{anchor=density}{8.6\\times10^{3}}"}],"highlights":[{"color":"green","style":"box","anchor":"density"}]},"order":1,"title":"Calculate the density","d

Density and states of matter

Question 42

Density and states of matter Questions

Density and states of matter

Question 42

Density and states of matter Questions