Science Class 9
Exploring Mixtures and their Separation
Tell mixtures apart, measure how strong one is, and pick a separation method.
10 lessons · ~73 min total
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Lessons in this topic
- 0 Start here A roadmap: same all through or not, three kinds of mixture, and how to pick a way to separate. · 4 min You are here
- 1 Same all through, or not A mixture is homogeneous if it is the same all through, and heterogeneous if its parts differ. · 6 min
- 2 Solution, colloid, suspension The size of the pieces sorts a mixture into a solution, a colloid or a suspension. · 8 min
- 3 Light through a mixture A light beam leaves a bright path in a colloid or a suspension, but hardly in a true solution. · 7 min
- 4 How strong is a solution Concentration compares the solute with the whole solution, written as a percentage. · 9 min
- 5 Picking a method A method works only on a property in which the parts differ, so match the method to the mixture. · 9 min
- 6 Getting back what dissolved Cool a hot saturated solution and crystals appear. Distillation and chromatography separate other solutions. · 10 min
- 7 More than two parts Several parts need several methods, run in an order that never undoes an earlier step. · 8 min
- 8 The big picture Seven ideas about mixtures on one screen, with the hand-off to your book. · 4 min
- 9 Track quiz Seven rules, then ten questions. · 8 min
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