Exploring Mixtures and their Separation
Class 9 · Science
4 ideas in Class 9 Science, explained in plain words, with games and quizzes to practise.
Classifying Mixtures and Solutions
Part of: Classifying Mixtures and Solutions
Homogeneous mixtures have a uniform composition, while heterogeneous mixtures do not. Solutions contain a solute dissolved in a solvent.
Why it matters. Knowing the properties of a mixture helps choose a sensible way to describe or separate it.
Try it in two minutes
- Observe whether the mixture is uniform and whether particles can be seen.
- Identify the useful difference between its components.
- Match that difference to the separation method.
Try at home. With an adult, observe how a safe kitchen mixture changes when stirred and then left undisturbed.
Solubility and Concentration
Part of: Solubility and Concentration
Concentration describes how much solute is in a given amount of solution. Solubility is the maximum amount that dissolves in a fixed quantity of solvent at a stated temperature.
Why it matters. Knowing the properties of a mixture helps choose a sensible way to describe or separate it.
Try it in two minutes
- Observe whether the mixture is uniform and whether particles can be seen.
- Identify the useful difference between its components.
- Match that difference to the separation method.
Try at home. With an adult, observe how a safe kitchen mixture changes when stirred and then left undisturbed.
Separating Homogeneous Mixtures
Part of: Separating Homogeneous Mixtures
Crystallization, distillation and paper chromatography separate components by differences in solubility, boiling point, or movement through a paper and solvent.
Why it matters. Knowing the properties of a mixture helps choose a sensible way to describe or separate it.
Try it in two minutes
- Observe whether the mixture is uniform and whether particles can be seen.
- Identify the useful difference between its components.
- Match that difference to the separation method.
Try at home. With an adult, observe how a safe kitchen mixture changes when stirred and then left undisturbed.
Suspensions, Colloids and Light Scattering
Part of: Suspensions, Colloids and Light Scattering
Suspensions have visible particles that can settle. Colloid particles stay dispersed and can scatter light; solutions do not show the Tyndall effect.
Why it matters. Knowing the properties of a mixture helps choose a sensible way to describe or separate it.
Try it in two minutes
- Observe whether the mixture is uniform and whether particles can be seen.
- Identify the useful difference between its components.
- Match that difference to the separation method.
Try at home. With an adult, observe how a safe kitchen mixture changes when stirred and then left undisturbed.
What your child will practise
- Classifying Mixtures and Solutions: Desert Quick Fire (Quick Fire)
- Classifying Mixtures and Solutions: Mission Control Sort (Sort It Out)
- Separating Homogeneous Mixtures: Lab Explorer Quest (Collect the Answer)
- Solubility and Concentration: Ocean Quick Fire (Quick Fire)
- Suspensions, Colloids and Light Scattering: Space Puzzle (Clue Puzzle)
- Quiz: Classifying Mixtures and Solutions (8 questions)
- Quiz: Separating Homogeneous Mixtures (8 questions)
- Quiz: Solubility and Concentration (8 questions)
- Quiz: Suspensions, Colloids and Light Scattering (8 questions)