YEAR 7/8 LESSON PLAN 4.
Lesson 2: Methods of separating mixtures

Summary

Learning outcomes

In this lesson, students will review about the various methods of
separating mixtures including simple distillation, Evaporation, Fractional
distillation and filtration.
They will learn about paper chromatography and its applications.
By the end of the lesson the learner should be able to understand that:
•
that a mixture of two or more solutes which are soluble in a particular
solvent can be separated by chromatography
 to separate and identify materials using chromatography
• How chromatography can be used to compare mixtures of solutes
• how scientists use evidence from chromatography.
Resources


Online resources including yu-tube.
PowerPoint presentation lesson 4: slides 20-25
Introducing the
lesson

Use the PowerPoint presentation to introduce paper chromatography too
students.
Explain to students that chromatography is a technique used for separation of
coloured soluble dyes.
Ask students to watch the uploaded videos on paper chromatography
techniques.


Main teaching
Use the uploaded slides of the power point to explain to learners about paper
chromatography.
Explain to learners what a chromatogram is and its applications in science
 Asking students to take notes.
Plenary/Homework

Exploring science grade 7 questions on paper chromatography. ( online
source)
Assessment
opportunities

Formative: Revise this topic using the uploaded slides to our Ms. Teams class
and make notes.
Practical work
Students to get black ink, an alcoholic sanitizer and a blank exercise book
paper to carry out an experiment on paper chromatography is illustrated by
the uploaded video clip.