🧪 Part 1: Understanding Chemical Changes

1. What is a chemical change?

When ice melts into water

When two substances mix to form something completely new

When you break a piece of paper in half

When water evaporates

2. Which of these are signs that a chemical reaction has occurred? (Check all that apply)

Bubbles or gas being produced

Temperature change (getting hotter or colder)

Colour change

Change in shape only

New substances being formed

3. In our experiment, we mixed _____________ and _____________ together.

The two substances were: _____________ and _____________

4. The gas that was produced when we mixed vinegar and baking soda is called:

Oxygen

Carbon dioxide

Hydrogen

Water vapour

🔍 Part 2: Recording Your Observations

5. Draw what you observed during the chemical reaction in the box below. Include labels for what you saw.

6. Describe what you observed using your senses:

What did you SEE?

What did you HEAR?

What did you SMELL? (if anything)

7. How do you know this was a chemical change and not just a physical change? Give at least two pieces of evidence.

🌟 Part 3: Thinking Like a Scientist

8. Predict what might happen if we used more baking soda but the same amount of vinegar:

9. Give three examples of chemical reactions you might see in everyday life:

1. _________________________________________________

2. _________________________________________________

3. _________________________________________________

10. Circle TRUE or FALSE for each statement:

TRUE / FALSE - In a chemical change, new substances are always formed.

TRUE / FALSE - You can easily reverse a chemical change.

TRUE / FALSE - Cooking an egg is an example of a chemical change.

TRUE / FALSE - Mixing oil and water is a chemical change.

11. What safety rules should we follow when doing chemical experiments?

Chemical Changes Investigation

Chemical Changes Investigation

🧪 Part 1: Understanding Chemical Changes

🔍 Part 2: Recording Your Observations

🌟 Part 3: Thinking Like a Scientist

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