Session One (1.2.1): Diffusion

 Introduction

To start with, learn the definition of diffusion and the role of kinetic energy in diffusion. You also need to be able to describe and explain how diffusion is affected by surface area, temperature, concentration gradients and diffusion distances.

Reading

Read through and make notes on pages 16-20 of your coursebook.

 Links

Now work through the following resources:

WATCH – Transport in Cells: Diffusion and Osmosis (YouTube) Links to an external site.

WATCH – Diffusion (Twig) [Not available with sample course]

WATCH – Transport across the cell membrane (Twig) [Not available with sample course]

Download

Download and read through this PowerPoint:

EXPLORE – Movement in and out of Cells (PPT) Download EXPLORE – Movement in and out of Cells (PPT)

Activity

Answer the questions on page 19.

Experiment

There are experiments that you can complete on pages 19 and 20 of your coursebook.

Please remember to review the Safety Guide Download Safety Guide

if you choose to complete them.

Review

Answer Questions 1 and 3 about diffusion on pages 27 and 28. Check your answers.