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Movement in and out of cells

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by

Paul Sheffield

on 16 June 2015

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Transcript of Movement in and out of cells

KEY POINTS
Define diffusion
Be able to EXPLAIN diffusion in terms of particles
Understand how surface area and volume affect diffusion
Explain how concentration affects diffusion
Use Partcles and kinetic theory to explain how temperature affects diffusion
Diffusion
Watch the video
Write down a definition for diffusion
How do you think temperature will affect the speed of diffusion?
Why?
How does size affect surface area to volume ratio?
Calculate the surface area and volume for a 0.5, 1 and 2cm3 cube
What do you notice about the surface area to volume ratio?
How might this explain why babies get cold faster than adults?
How might it explain why animals evolved exchange surfaces as they got bigger?
Starter
what are the following structures used for?
What do they have in common?
Movement in and out of cells
L.O
Diffusion
Surface area to volume
Concentration

Factors affecting Diffusion
Surface area to volume ratio
Concentration
Temperature
Draw the particles in a solid, liquid and gas
Full transcript