Diffusion and Osmosis
Resources
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Teaching Tool: Diffusion and Osmosis
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Lesson: Diffusion and Osmosis
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Worksheet: Diffusion and Osmosis (to be completed alongside the lesson)
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Overview
General description
This lesson is driven by the accompanying worksheet, and the two together are
designed to focus students’ attention on the key learning points on each page.
In this lesson students investigate how diffusion and osmosis can be explained by the
behaviour of particles.
Assumed prior knowledge
Students should already be able to:
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describe basic kinetic theory;
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describe the structure of a typical cell;
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demonstrate a knowledge of solutes and solvents.
Objectives
Having completed this lesson, students should be able to:
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describe the movement of the particles in a gas;
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explain diffusion;
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explain how particles distribute themselves across a semipermeable membrane;
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describe osmosis across a root-hair cell.
Copyright © 2004 PLATO Learning (UK) Ltd. All rights reserved.
Multimedia Science School range of software is distributed by RM under licence from PLATO® Learning, Inc.
Diffusion and Osmosis
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Teaching tips
Running the lesson
The questions in the worksheet could be answered in exercise books or directly on the
worksheet if you modify it to provide space for answers. The worksheet is progressively
more demanding and can be easily adapted – for example, by adding or removing
questions – providing further opportunities for differentiation. The lesson and worksheet
together are designed to be completed in 50 minutes.
The first half of the lesson covers diffusion and the second half covers osmosis. You
may prefer to tackle the work as two separate lessons, covering one process in each.
Copyright © 2004 PLATO Learning (UK) Ltd. All rights reserved.
Multimedia Science School range of software is distributed by RM under licence from PLATO® Learning, Inc.