Exploring Chemical Change

Name:

Date:

📚 Part 1: Understanding and Identifying

WALT: We are learning to understand what a chemical change is.
Success criteria: I can define a chemical change, give examples, and tell the difference between chemical and physical changes.

1. Which statement best describes a chemical change?

The substance changes shape but stays the same substance.

A new substance is formed and the change is often irreversible.

The temperature changes but no new substances are made.

2. Check all signs that often show a chemical change has happened:

Colour change

Melting into a liquid

Gas or fizz produced

Dissolving without new substances

Heat or light given off

3. When iron left outside turns orange-brown (rusts), this is:

A physical change — the iron is the same substance

A chemical change — a new substance (rust) forms

A reversible change by warming

4. Match each example to the correct type of change. Draw a line from the example to the label.

A. Burning paper

B. Melting chocolate

C. Baking bread

D. Dissolving sugar in tea

E. Iron forming rust

1. Physical change

2. Chemical change

✏️ Part 2: Short Answers, Explanation & Extension

5. In your own words, define "chemical change":

6. Explain one clear difference between a chemical change and a physical change. Give one example of each:

7. Observing a classroom demo: vinegar mixed with baking soda fizzes and bubbles. Is this a chemical change? Explain your answer using evidence (what you observe):

8. Extension (for advanced learners): Choose a chemical change you see at home (e.g. cooking, rusting, burning). Write the example and one question you will research about why it happens. Due: ____/____/______

Differentiation & Supports: Visuals and sentence starters are recommended. Use text-to-speech for reading. For learners who need extra help, write one-sentence answers; advanced learners can include causes or chemical names.