KS3 Biology — Breathing, Respiration and Gas Exchange — Extension Pack

🫁 Stretch high achievers further with four ready-to-use enrichment activities on breathing, respiration and gas exchange — 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 these tasks push students to apply that thinking, for KS3 students aged 11–14.

📦 What's included:

Vocabulary Matching (12 terms) — covering key terms from mitochondria to diffusion

Challenge Quiz (28 marks) — true/false statements, a data interpretation table comparing inhaled and exhaled air, and applied reasoning questions

Sherpa Mountain Guides Case Study (21 marks) — biological adaptation to low oxygen at high altitude in the Himalayas

Teach It Back task — students write a simplified explainer for a much younger audience, assessed with a provided rubric

Full answer keys and marking guidance included for all four 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.

🔓 Pairs with the main 100-mark breathing, respiration and gas exchange worksheet, also available as part of the Complete Lesson Pack. Save £1 buying the pack (£3 + £3 = £6 separately, £5 together).

Price: £3