A complete, ready-to-teach lesson for AQA GCSE Chemistry (C7 – Energy Changes).
This resource covers exothermic and endothermic reactions, reaction profiles, bond energy calculations, and real-world applications all delivered in a clear, engaging format.

Perfect for Year 10–11, this lesson is ideal for classrooms, revision sessions, intervention groups, or cover lessons. Everything is fully scaffolded, visually clean, and designed so students can work independently or guided by the teacher.

What’s Included
Fully Editable PowerPoint (30–40 mins of teaching)

What is an exothermic reaction?

What is an endothermic reaction?

Everyday examples (sports packs, combustion, hand warmers, photosynthesis)

Temperature change practical idea (with results tables)

Reaction profile diagrams

Activation energy explained

Bond energy calculations:

• Breaking vs making bonds
• Step-by-step worked example
• Try-it-yourself questions with answers

Student Worksheet Pack

Key word fill-in task

Mini-experiment worksheet (temperature change practical)

Reaction profile sketching task

Bond energy calculation questions (easy → challenging)

Multiple-choice retrieval questions

Short and long exam-style questions

Mark schemes included

Exam Question Set (AQA style)

1–6 mark structured questions

Multiple choice questions

Bond energy calculation exam items

Reaction profile diagram question

Full teacher mark scheme

Learning Objectives

By the end of the lesson students will be able to:

Identify and describe exothermic and endothermic reactions

Interpret reaction profile diagrams

Explain activation energy

Use bond energies to calculate energy changes

Apply knowledge to exam-style questions

Retrieval & Starter Activities

Do Now: Spot the exothermic vs endothermic examples

Retrieval grid on previous C6 content

Diagnostic questioning and hinge-point tasks

Misconception checks built into the slides

Perfect For

• GCSE Chemistry teachers
  -AQA (but suitable for OCR & Edexcel with minimal/no changes)
  -Revision lessons
  -Cover lessons
  -ndependent learning or homework

Why Teachers Love This Resource

Fully editable files

Clear, student-friendly explanations

No extra planning needed

Exam-focused and curriculum-matched

Includes AFL, worksheets, and answers