Discovering Chemical & Physical Changes

• newEditor
• Science
• Primary Education
• Age 9

Discovering Chemical & Physical Changes

What do you already know about how substances can change?

Learning Objective

At the end of the lesson you will be able to describe, compare, and identify chemical and physical changes, explain their differences using examples, and relate these changes to everyday life in the UAE.

Starter Exercise: Think-Pair-Share

Think: Have you ever seen ice melt or paper burn? Pair: Share with your partner what happened. Discuss: Was it a chemical or a physical change?

Pre-Assessment Activity

Show a list of simple scenarios (e.g., tearing paper, baking a cake). Ask students to guess if each is a chemical or physical change. Collect answers with a show of hands.

Learning Objectives: Bloom's Levels

Higher Order

3) Compare and differentiate both types of changes. 4) Predict the type of change in a new scenario.

Lower Order

1) Define chemical and physical change. 2) Identify examples of each.

Success Criteria

You will know you are successful if you can: - Accurately define and identify chemical and physical changes - Give real-life examples from the UAE - Explain how you know which is which

Key Words

Physical Change, Chemical Change, Reversible, Irreversible, Reaction, Properties, Evidence

Explanation: Chemical vs Physical

A physical change alters the form but not the identity of a substance (e.g., ice melting). A chemical change creates a new substance (e.g., rusting iron, baking bread).

Differentiated Activity

Read scenarios and sort them as chemical or physical. Write one example from the UAE for each.

Match pictures to the correct type of change.

Group B: Scenario Sorting

Group A: Matching

Brain Break: 1-Minute Stretch

Critical Thinking Question

If water is boiled in the desert and then mixed with sand, is it a chemical or physical change? Explain your reasoning.

Plenary: Quiz Time!

Quick fire quiz! Identify if given UAE scenarios (e.g., making tea, rusting pipes, folding laundry) are chemical or physical changes.

Exit Ticket

Write one example of a chemical and a physical change that you can observe at home in the UAE.

Assessment & Homework

- Assessment: Complete worksheet with 5 scenarios, explaining the type of change and the evidence. - Homework: Observe and record two different changes you see at home (one chemical, one physical), and explain why you think so.

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.