IB Biology D2.3: Water Potential (first exams in 2025)

This lesson can be purchased as part of the IB Complete course bundle (first exams 2025) at a heavily discounted price, formed of 40 fully resourced lessons, end of topic exams and student checklists. It can be found here

This PowerPoint contains everything you need to teach the Theme/Unit D2.3: Water Potential in the new IB Biology specification.

YouTube video is a preview of the full resource (does not include all slides)

This Powerpoint consists of over 45 slides and contains the followings:

All the information the IB have included in the new spec.

• Clear diagrams
• Student friendly content
• Summary videos
• Student research tasks
• Clearly identified HL and SL content
• Student checklist
• Summary

Updated November 2024

The following content is included:

D2.2.1: Explain how water is able to dissolve many substances
D2.2.2: Explain the movement of water from less concentrated to more concentrated solutions.
D2.2.3: Predict the net movement of water based on the environment of a cell.
D2.2.4: Outline the changes that occur to plant tissues bathed in hypotonic and hypertonic solutions.
D2.2.5: Explain the effects of water movement into and out of cells on cells that lack a cell wall.
D2.2.6: Explain the effects of water movement into and out of cells on cells that have a cell wall.
D2.2.7: Outline medical applications of isotonic solutions.
D2.2.8: Define the term water potential.
D2.2.9: Explain the direction that water moves in terms of water potential.
D2.2.10: Explain how solute potential and pressure potential affect the water potential within cells.
D2.2.11: Explain the changes that occur when a plant tissue is bathed in either a hypotonic or hypertonic solution in terms of solute and pressure potentials.