Lesson 5: Year 7 Diffusion Worksheet + Answers

KS3 Year 7 Biology worksheet on diffusion: particles, cell membrane, gas exchange and a temperature graph. Diagrams, practical and full answers included.

Lesson 5 of a five-lesson KS3 Cells unit. Use it for a class lesson, cover, revision, homework or home study.

What students do: a retrieval starter, vocabulary and a short reading text. They draw the end result of dye spreading in water, then label oxygen entering a cell and gas exchange in the lungs. They complete gap-fills, plot a temperature graph and answer true or false questions and short answers with marks shown. The challenge task includes a draw-and-annotate activity. The practical compares colour spreading in hot and cold water and includes a mean calculation.

Teacher answer key: labelled diagrams and a completed graph, model answers with mark points (58 marks), common misconceptions, three verbal check questions and a 50-minute timing plan.

Details: 6-side student pack plus 5-side key, A4, with original diagrams. Foundation, core and challenge tasks, with sentence starters and word banks. Dyslexia-friendly layout, UK spelling.

Check the practical against your school’s risk assessment before use. These are worksheets, not lesson plans or slides.