KS3 Biology — Breathing, Respiration and Gas Exchange — Complete Lesson Pack

Get everything you need to teach breathing, respiration and gas exchange at KS3 — no preparation required. Breathing moves air in and out of the lungs, gas exchange swaps oxygen and carbon dioxide between the air sacs and the blood, and cellular respiration releases energy inside mitochondria, and this pack covers the mechanics and biology of all three for students aged 11–14.

📦 What's included:

Main Worksheet — 17 questions, 100 marks

Section 1: Knowledge Recall (30 marks) — multiple choice, true/false, fill-in-the-blank word summary

Section 2: Application and Understanding (40 marks) — short-answer questions, process-comparison table, key term definitions, candle experiment analysis

Section 3: Extension and Analysis (30 marks) — extended writing on exercise physiology, rescue breaths, and a high-altitude case study

Full answer key with detailed marking guidance

Extension Pack — 4 activities

Vocabulary Matching (12 marks)

Challenge Quiz (28 marks)

Sherpa Altitude Case Study (21 marks)

Teach It Back (rubric-assessed)

Full answer keys included for all activities.

🎬 Watch the free video lesson: https://www.youtube.com/watch?v=0Guceqzok98

👩‍🏫 Google Classroom ready — copy the link straight into your assignment. Print as many copies as your class needs.

Buying this bundle saves £1 compared to purchasing both resources separately (£3 + £3 = £6 individually, £5 as a pack).

Price: £5