ThinkRankMaterials Around Us
Objects are made from materials chosen for particular properties. Wood, metal, glass, plastic, cotton, and natural fibres differ in hardness, flexibility, transparency, solubility, strength, and response to heat or water. Comparing properties helps explain why a material is suitable for one purpose but unsafe or ineffective for another.
Learning Objectives
- •Describe observable properties of materials
- •Group materials using a stated property
- •Relate material choice to use
- •Recognise the value of reducing waste and reusing materials
Key Concepts
Properties guide choice
A material is selected because its properties fit a purpose, such as transparency for a window or flexibility for a cable covering.
One object, many materials
An object may combine materials so that each part contributes a useful property.
Use affects environment
Material choices also have consequences for extraction, manufacture, reuse, and disposal.
Terminology
Historical Insight
A school bag
Fabric provides flexibility, thread joins pieces, and plastic or metal parts may provide strength and closure.
Quick Check
Why is glass useful for a window but unsuitable for a school bag?
What is the difference between an object and the material used to make it?
How to use this lesson
Read the overview first, then explain the main idea in your own words before checking the key concepts. Use the quick-check questions without looking at the answer. For examination preparation, verify dates, definitions, and syllabus requirements against your official textbook and school or examination-board guidance.