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🔬 Science - Class 8
Unit 9 · Matter

Chemical Reaction and Chemical Equation Presentation

ScienceSubject
8 minEstimated read
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Science and Technology, Class 8

Chemical Reactions and Equations

Two kinds of change · Reactants and products · Balancing equations

What We Will Learn Today

🧊

Tell a physical change from a chemical change

⚛️

Say what happens to atoms in a chemical reaction

➡️

Pick out the reactants and the products

⚖️

Balance a formula equation

Two Kinds of Change

🧊Physical change
Inner properties stay the same
No new substance is formed
It can be reversed
Example: ice melting
VS
🔥Chemical change
Inner properties change
A new substance is formed
It cannot be reversed
Example: paper burning

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Presenter notes: Ask the class whether melting ice and burning paper are the same kind of change. Both are changes, yet only one can be undone. Open the lesson from that question.