B4.1.3.1

Diffusion

Content

  • Water may move across cell membranes via osmosis. Osmosis is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.

Students should be able to:

  • use simple compound measures of rate of water uptake
  • use percentages
  • calculate percentage gain and loss of mass of plant tissue.
  • Students should be able to plot, draw and interpret appropriate graphs.

Recognise/draw/interpret diagrams. Translate from data to a representation with a model. Use models in explanations, or match features of a model to the data from experiments or observations that the model describes or explains. Make predictions or calculate quantities based on the model or show its limitations. Give examples of ways in which a model can be tested by observation or experiment.

Recognise and use expressions in decimal form,

Use ratios, fractions and percentages,

Translate information between graphical and numeric form,

Understand that y = mx + c represents a linear relationship,

Plot two variables from experimental or other data,

4d