Year 9 Science · Unit 2 · Lesson 03

Chemical Properties and Why They Matter

Foundation Worksheet

Name

Date

Class

Learning Goals

Identify key chemical properties including flammability, reactivity, and corrosion resistance.
Distinguish between physical changes and chemical changes using real examples.
Sort everyday materials and processes into physical or chemical property categories.

Warm Up

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Rusting is a physical property because iron just changes shape.

Correct it:

Gold is used in jewellery partly because it has very low corrosion reactivity.

Correct it:

Flammability is a physical property because nothing changes permanently when something burns.

Correct it:

Aluminium corrodes more slowly than iron because its oxide layer is protective.

Correct it:

Galvanising protects steel by coating it with zinc, which corrodes first and acts as a sacrificial layer.

Correct it:

Your Turn

Sort it!

Write each item from the pool into the correct category box below.

melting gold iron rusting glass being transparent wood burning copper being ductile petrol being flammable potassium reacting violently with water water being dense at 1 g/cm³ steel corroding in salt spray aluminium being shiny

Physical Property

Chemical Property

Show What You Know

1. Name two chemical properties of iron and explain what happens to iron during each one.

Recall 2 marks

2. Explain the difference between a physical change and a chemical change. Give one example of each using materials from this lesson.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?