🧪 Part 1: Understanding Chemical Reactions

1. What is a chemical reaction?

2. Circle the correct answer: What happens during a chemical reaction?

Substances change shape only

New substances are made

Nothing changes at all

Things just get bigger

3. Fill in the blanks using the words: reactants and products

In a chemical reaction, the starting materials are called _____________ and the new substances that are made are called _____________.

⚗️ Part 2: Chemical or Physical Change?

4. Look at each example below. Tick whether it is a chemical change or physical change:

a) Ice melting into water

Chemical Change

Physical Change

b) Baking soda and vinegar fizzing and bubbling

Chemical Change

Physical Change

c) Tearing a piece of paper

Chemical Change

Physical Change

d) A candle burning and melting

Chemical Change

Physical Change

e) An apple turning brown

Chemical Change

Physical Change

f) Salt dissolving in water

Chemical Change

Physical Change

🔬 Part 3: Observing Chemical Reactions

5. When we mixed baking soda and vinegar in class, what did you observe? Check all that apply:

Bubbles formed

Gas was released

The mixture got fizzy

Nothing happened

The temperature changed

6. Draw what you observed during the baking soda and vinegar experiment:

7. Explain why the baking soda and vinegar experiment is a chemical reaction:

🏠 Part 4: Chemical Reactions in Everyday Life

8. Match the everyday examples with the type of chemical reaction:

1. Cooking an egg

2. A bike getting rusty

3. Burning wood in a fireplace

4. Baking a cake

A. Metal reacting with oxygen

B. Heat changing proteins

C. Ingredients combining with heat

D. Combustion reaction

9. Name two chemical reactions you might see in your kitchen:

10. Circle the signs that tell you a chemical reaction might be happening:

Colour change

Gas bubbles forming

Temperature change

New smell

All of the above

🤔 Part 5: Think Like a Scientist

11. You notice that a piece of fruit has gone brown overnight. Explain whether this is a chemical or physical change and why:

12. Design your own safe chemical reaction experiment. What two safe materials would you mix and what do you predict would happen?

Materials: _________________ and _________________

Prediction:

13. Why is it important to be safe when observing chemical reactions?

Chemical Reactions Worksheet

Chemical Reactions Worksheet

🧪 Part 1: Understanding Chemical Reactions

⚗️ Part 2: Chemical or Physical Change?

🔬 Part 3: Observing Chemical Reactions

🏠 Part 4: Chemical Reactions in Everyday Life

🤔 Part 5: Think Like a Scientist

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