Diffusion through a permeable material: practical
I can explain observations of diffusion through jelly cubes (a permeable material).
Diffusion through a permeable material: practical
I can explain observations of diffusion through jelly cubes (a permeable material).
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Particles of a liquid can move through a material by diffusion if the material is permeable.
- Observe a liquid diffusing into a jelly cube.
- Predict and observe effect of temperature on the diffusion of a liquid into a jelly cube.
- Predict and observe effect of cube size on the diffusion of a liquid into a jelly cube.
- Use ideas about particles and diffusion to explain these observations.
Keywords
Diffusion - Diffusion is the net movement of particles of a substance down a concentration gradient.
Net movement - Net movement is the overall movement of particles from one area to another.
Permeable - A material is permeable if particles of a liquid are able to move through it.
Variable - In a science experiment, a variable is a factor that can be changed, kept the same, or measured.
Prediction - A scientific prediction is a testable statement about a possible outcome of an experiment
Common misconception
Particles cannot diffuse through a seemingly solid material.
This practical lesson enables students to observe diffusion of acid through permeable cubes of coloured jelly.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
Lesson video
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Starter quiz
6 Questions
different concentrations of particles in one area and another
the overall movement of particles from one area to another
the net movement of particles down a concentration gradient
Exit quiz
6 Questions
temperature of the acid
time taken to decolourise each cube
the size of the cubes
