# A student places a green plant on a windowsill in sunlight. After several hours, small bubbles are seen rising from the leaves when the plant is submerged in water. Explain what is happening inside the plant's cells to produce these bubbles.

> Eduqas GCSE Biology — 1.5.2 Photosynthesis · Explain · 4 marks

> A student places a green plant on a windowsill in sunlight. After several hours, small bubbles are seen rising from the leaves when the plant is submerged in water.

## Mark scheme (4 marks)

1. The plant is carrying out photosynthesis
2. Light energy is used / sunlight provides the energy needed for photosynthesis
3. Water and carbon dioxide are converted into glucose and oxygen
4. The bubbles are oxygen, which is a product / by-product of photosynthesis

## Related

- [Revision notes for Eduqas GCSE Biology](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-places-a-green-plant-7da36274) · Published by Druglandscape Ltd.