📚 Part 1: Understanding Chemical Reactions

1. What is a chemical reaction?

When substances mix together without changing

When substances change into new substances

When substances change colour only

When substances get hot

2. In a chemical reaction, the starting substances are called __________ and the new substances formed are called __________.

3. Which of these are signs that a chemical reaction might be happening? (Tick all that apply)

Colour change

Gas bubbles forming

Temperature change

New smell

Mixing two liquids

4. When vinegar and baking soda react, what are the reactants?

5. Circle the everyday examples that involve chemical reactions:

Burning wood Melting ice Baking a cake Boiling water Rusting iron

🔬 Part 2: Types of Chemical Reactions

6. Match each reaction type to its description by drawing lines:

Combination

Decomposition

Displacement

One element replaces another in a compound

Two or more substances join to form one new substance

One substance breaks down into two or more substances

7. For each scenario, identify if a chemical reaction occurs and name the type:

a) Iron + Oxygen → Iron oxide (rust)

Chemical reaction? _______ Type: _________________

b) Water breaking down into hydrogen and oxygen

Chemical reaction? _______ Type: _________________

8. Explain why understanding chemical reactions is important in everyday life. Give one specific example.

🌟 Extension Challenge

9. Advanced Task: Research one unusual type of chemical reaction (such as an endothermic reaction) and describe what makes it special. Prepare to share with the class.

10. Reflection: What is one new thing you learned about chemical reactions today?

Chemical Reactions Introduction

Chemical Reactions Introduction

📚 Part 1: Understanding Chemical Reactions

🔬 Part 2: Types of Chemical Reactions

🌟 Extension Challenge

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