This lesson builds on students’ foundational understanding of combustion by introducing reactants, products and the Law of Conservation of Mass. Pupils learn to write clear word equations for combustion reactions, apply conservation principles to burning fuels, and investigate how water is formed during combustion. The lesson combines explanation, modelling and practical enquiry to strengthen scientific reasoning and chemical literacy.

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

Define reactants and products

Write word equations for combustion reactions

Apply the Law of Conservation of Mass to burning

Investigate how water is formed when we burn fuel

This ready‑to‑teach PPT and worksheet set strengthens chemical understanding, supports accurate scientific writing and prepares students for later lessons on complete vs incomplete combustion and energy changes.