# Explain why water moves from the soil into the root hair cells of a plant.

> WJEC GCSE Biology (Wales) — 1.1.2 Movement of substances · Explain · 4 marks

> Root hair cells are in direct contact with soil water. The cell contents of root hair cells contain dissolved mineral ions and sugars.

## Mark scheme (4 marks)

1. The process by which water moves is osmosis
2. The root hair cell has a lower water potential / higher solute concentration than the soil water
3. Water moves down a water potential gradient / from high to low water potential
4. Water moves through the partially permeable membrane of the root hair cell

## Related

- [Revision notes for WJEC GCSE Biology (Wales)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

---
Source: [GradeNine](https://www.gradenine.co.uk/q/explain-why-water-moves-from-the-189fe377) · Published by Druglandscape Ltd.