Quick answer: This page gathers the 15 lessons of grade 8 science (Year 9 · Class 8), one per chapter: atoms and molecules, periodic table, balancing equations, combustion, pH scale, synthetic materials, exothermic endothermic, Ohm's law and 7 more. Each lesson gives a quick answer, worked examples, diagrams and key points, with a free PDF download. Written by a team of 12 qualified science teachers.
All the grade 8 science lessons are on this page, chapter by chapter: each lesson gives a quick answer, worked examples and diagrams, with a free PDF download. Back to the grade 8 science overview.
Grade 8 science lessons by chapter
Grade 8 science lessons
Clear science lessons with diagrams, laws, formulas and worked examples.
How atoms join to make molecules
Learn what atoms and molecules are, how to read chemical formulas like H₂O and CO₂, count atoms with subscripts and coefficients, and use ball-and-stick mod
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Using symbols and the periodic table
Learn element symbols, how compounds differ from mixtures, and how to read the periodic table: groups, periods, atomic number, metals and non-metals.
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Balancing equations and conserving atoms
Balancing equations notes (Grade 8 science): learn how atoms are rearranged in chemical reactions.
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Fire, fuels and burning safely
Combustion notes (Grade 8 science): learn the fire triangle, how carbon and methane burn to make carbon dioxide and water.
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Measuring acidity with the pH scale
PH scale notes (Grade 8 science): learn the pH scale, indicator colours, how dilution changes pH and how to handle acids and alkalis safely.
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From crude oil to plastics and fibres
Synthetic materials notes (Grade 8 science): find out how crude oil becomes plastics, what monomers and polymers are.
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Why some changes heat up and others cool
Exothermic endothermic notes (Grade 8 science): learn how to tell exothermic from endothermic changes.
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Resistance and how Ohm linked v, i and r
Ohm's law notes (Grade 8 science): learn what resistance is, how to use V = I × R, how to read I–V graphs and why a lamp is not ohmic.
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Power, energy and electricity bills
Learn electrical power for grade 8: watts, P = V × I, E = P × t, kilowatt-hours and how to work out an electricity bill, with worked examples.
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Magnets, fields and electromagnets
Electromagnet notes (Grade 8 science): learn magnets for grade 8: poles, magnetic field lines.
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Newton's three laws of motion
Newton's laws notes (Grade 8 science): learn Newton's three laws for grade 8: inertia, F = m × a with worked examples, and action-reaction pairs.
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Reading motion graphs and acceleration
Motion graphs notes (Grade 8 science): learn distance-time and speed-time graphs for grade 8: gradient, acceleration, the area under a graph.
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Splitting light, coloured filters, lenses and the eye
Colour and lenses notes (Grade 8 science): learn how a prism splits white light, how coloured filters work.
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Radio to gamma waves and digital signals
Electromagnetic spectrum notes (Grade 8 science): learn the order of the electromagnetic spectrum, the wave equation v = fλ.
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Fuels, nuclear power, renewables and the climate
Compare fossil fuels, nuclear and renewable energy resources, learn how power stations work, calculate efficiency and see how CO2 changes the climate.
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