🧪 Part 1: Understanding the Experiment

1. What type of change is the elephant toothpaste experiment?

Physical change

Chemical change

No change occurs

2. Which THREE ingredients are needed for elephant toothpaste? (Tick all that apply)

Hydrogen peroxide

Yeast

Vinegar

Liquid soap

Baking soda

3. What gas is produced during the reaction?

Carbon dioxide

Oxygen

Nitrogen

Hydrogen

4. An exothermic reaction means the reaction:

Gets colder

Releases heat

Changes colour

Makes noise

📝 Part 2: Observations and Explanations

5. Describe what you observed when the yeast mixture was added to the hydrogen peroxide:

6. Fill in the blanks using the words: catalyst, oxygen, foam, exothermic

The yeast acts as a _____________ to help hydrogen peroxide break down into water and _____________ gas. The soap traps this gas to create _____________. Because the reaction releases heat, it is called an _____________ reaction.

7. What role does the soap play in this experiment?

8. How could you tell that this was an exothermic reaction during the experiment?

🔬 Part 3: Scientific Thinking

9. Give TWO examples of other exothermic reactions you might see in everyday life:

1. _________________________________

2. _________________________________

10. What safety equipment did we use during this experiment and why was it important?

11. How is the elephant toothpaste experiment different from just mixing water and soap together?

Elephant Toothpaste Experiment

Elephant Toothpaste Experiment

🧪 Part 1: Understanding the Experiment

📝 Part 2: Observations and Explanations

🔬 Part 3: Scientific Thinking

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