KS3 Biology — Infectious and Non-Infectious Diseases — Free Worksheet

🦠 Find out what a disease is and how infectious and non-infectious diseases differ with this free KS3 Biology worksheet — no preparation required, just download and use. Infectious diseases are caused by pathogens such as viruses and bacteria and can spread between organisms, while non-infectious diseases cannot spread and are instead linked to lifestyle factors or genetics, and this taster resource introduces the basics for students aged 11–14.

📦 What's included:

3 questions, 12 marks:

Multiple choice — identifying a pathogen from a list of options

Fill-in-the-blank — a passage covering the definition of disease and the two main categories

Short answer — explaining the difference between infectious and non-infectious diseases with examples

Full answer key with mark-by-mark guidance included.

🎬 Watch the free video lesson: https://www.youtube.com/watch?v=miv38MVGYuM

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

🔓 This is a taster only. The full 100-mark worksheet goes deeper into measles and how it spreads, tuberculosis and antibiotic treatment, non-infectious disease risk factors including smoking and obesity, type 2 diabetes symptoms and management, and coronary heart disease and stroke — available on its own, or as part of the Complete Lesson Pack with extension activities. Save £1 buying the pack (£3 + £3 = £6 separately, £5 together).

Price: Free