Key learning points

1. Particles of a liquid can move through a material by diffusion if the material is permeable.
2. Observe a liquid diffusing into a jelly cube.
3. Predict and observe effect of temperature on the diffusion of a liquid into a jelly cube.
4. Predict and observe effect of cube size on the diffusion of a liquid into a jelly cube.
5. 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