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Conservation of Mass Digital Lesson | KS3 Chemistry Year 8 Self-Marking

★★★★★ 5.0 Year 9 Science 🎓 Interactive Lesson & Activities
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⚖️ Teach the Law of Conservation of Mass with this engaging, interactive KS3 Chemistry lesson!

Help Year 8 students understand that mass is conserved during chemical reactions through an interactive digital lesson packed with self-marking activities, animations, drag-and-drop tasks and instant feedback.

Designed for KS3 Science, this no-prep resource makes an ideal classroom lesson, independent learning activity, homework or cover lesson.

Perfect for:

  • Year 8 Chemistry
  • KS3 Science
  • Home learning
  • Cover lessons
  • Revision
  • Assessment for Learning (AfL)

Students will learn:

  • ✔ The Law of Conservation of Mass.
  • ✔ Reactants and products.
  • ✔ Why atoms are rearranged during reactions.
  • ✔ Open vs closed systems.
  • ✔ How gases affect measured mass.
  • ✔ Evidence that mass remains constant.
  • ✔ Applying conservation of mass to simple chemical reactions.
  • ✔ Interpreting particle models.

Interactive Activities Include

  • ✅ Introduction video.
  • ✅ Interactive teaching slides.
  • ✅ Drag-and-drop activities.
  • ✅ Matching exercises.
  • ✅ Multiple-choice quizzes.
  • ✅ Fill-in-the-gap questions.
  • ✅ Sorting activities.
  • ✅ Self-marking knowledge checks.
  • ✅ End-of-lesson assessment.

What’s Included

  • Interactive HTML5 lesson.
  • Self-marking activities.
  • Teacher answer key.
  • Instant student feedback.
  • No preparation required.

Ideal For

  • KS3 Science.
  • Year 8 Chemistry.
  • Classroom teaching.
  • Independent learning.
  • Homework.
  • Remote learning.
  • Revision.
  • Cover lessons.
  • Intervention groups.

Curriculum Links

National Curriculum England – KS3 Science

Chemistry

  • Chemical reactions
  • Conservation of mass
  • Differences between chemical and physical changes
  • Representing chemical reactions using word and symbol equations
  • Rearrangement of atoms during reactions

Suitable for:

  • National Curriculum KS3
  • AQA KS3 Activate
  • OCR Gateway KS3
  • Edexcel KS3 Science
  • Most UK secondary science schemes of work.
Year GroupYear 9 Science
Resource Type🎓 Interactive Lesson & Activities
FormatDigital Only
CurriculumEngland & Wales — KS3 (Years 7–9)
Added24 July 2026

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