Changes in the Earth’s Atmosphere – GCSE Chemistry 4 Mark Explain Question Scaffolded Worksheet

A fully scaffolded 4-mark GCSE Chemistry exam-style question on changes in the Earth’s atmosphere, focusing on how nitrogen and oxygen levels changed over time. Perfect for quick classroom use, homework, or revision.

Includes:
• Exam-style 4-mark question with command word highlighted
• Scaffolded sticky-note layout: Command Word, Success Criteria, Keywords, and Hint/Support
• Model answer aligned with the AQA mark scheme
• Matching fill-in-the-gaps version for differentiation
• Randomised word bank for retrieval practice

Covers key ideas from Earth’s early atmosphere, volcanic activity, photosynthesis, and biological evolution.
Aligned with AQA GCSE Chemistry Paper 2 but suitable for all exam boards.