NCERT Class 6–8 Science (Curiosity): chemistry with simulations

The chemistry chapters of the NCERT Curiosity science textbooks for Classes 6, 7 and 8 in book order: materials and how to separate them, acidic and basic substances, metals and non-metals, changes around us, and the particle nature of matter. Each topic links to simulations that show it working.

11 topics · 20 simulations

Class 6

Properties of materials: lustre, hardness, transparency, solubility, float or sink Curiosity 6 Ch 6 Materials Around Us
Handpicking, threshing, winnowing, sieving, sedimentation, decantation, filtration, evaporation Curiosity 6 Ch 9 Methods of Separation in Everyday Life
- Separating mixtures: decanting, filtration, evaporation, separating funnel, distillation

Class 7

Natural and laboratory indicators Curiosity 7 Ch 2 Exploring Substances: Acidic, Basic and Neutral
- Acid–base indicators – litmus, phenolphthalein, red cabbage, universal indicator
Neutralisation in daily life Curiosity 7 Ch 2 Exploring Substances: Acidic, Basic and Neutral
- Acids, bases and indicators – titration drop by drop
- pH scale – measuring and mixing acids and bases
Physical properties of metals and non-metals Curiosity 7 Ch 4 The World of Metals and Non-metals
- Metallic bonding and alloys – sea of electrons, conductivity, malleability and the bonding triangle
- Testing material properties and comparing fuels
Reactions with oxygen and water; acidic and basic oxides Curiosity 7 Ch 4 The World of Metals and Non-metals
- Oxides of Period 3 – acidic, basic and amphoteric (virtual lab)
- Metal reactivity series – dropping metal into solution
Physical and chemical changes and their evidence Curiosity 7 Ch 5 Changes Around Us: Physical and Chemical
- Physical and chemical changes – evidence bench
Rusting and its prevention; crystallisation Curiosity 7 Ch 5 Changes Around Us: Physical and Chemical
- Electrochemical corrosion of metals (Fe–Cu, Fe–Zn, Fe–Sn) and sacrificial protection
- Making a salt – copper sulfate crystals from an insoluble base and acid

Class 8

Particles, spaces between them, diffusion and states Curiosity 8 Ch 7 Particulate Nature of Matter
Elements, compounds and mixtures Curiosity 8 Ch 8 Nature of Matter
- Elements and compounds in 3D – molecular models, formulae and molecular mass
- Building molecules – atoms, valence, formulas and 3D shapes
Solutions, concentration, saturation and solubility against temperature Curiosity 8 Ch 9 The Amazing World of Solutes, Solvents and Solutions
- Solution concentration – add solid, drip, evaporate
- Dissolving at particle level – hydration, like dissolves like and enthalpy of solution

Topics follow the published curriculum; the mapping to simulations is by Simulic. Simulic is not affiliated with NCERT.