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Chemistry Section A : Everyday materials and their properties

Part 2: Information

A. Packaging materials (available as pdf download)

All around us we use materials to 'package' substances. (Store or put things in)

In class you will have seen a selection of packaging materials like in the picture below:

Select five different types of packaging and for each one, name the material used and give a reason for that material being used. Put your answers in a table like the one below

Packaging Material used Substance stored Reason
       
       
       
       

From your materials selected you should be able to classify them into 3 groups. What do you think are the 3 groups?

B. Classifying Materials (available as pdf download)

We can classify materials into 3 groups

1. Metals. Examples iron, copper aluminium etc.. Metals will be looked at in more detail in section 3 "A Closer Look at Metals."

2. Organic materials Examples: Plastics, paper and carton (cardboard). Also includes fibres.

There are many types of plastics and because they have quite long names an abbreviation is used.

Link to plastics activity

Type of Plastic Name Abbreviation

Polyethyleneterephthalate PETE

High density polyethlene HDPE

Polyvinylchloride PVC

Low density polyethlene LDPE

polypropylene PP

Polystyrene PS

3. Ceramics Examples: Glass, porcelain and clay

 

C. Examples with descriptions

Type

Description

Examples

Metals Shiny solids that conduct electricity and heat. They are often malleable and ductile Copper, iron and aluminium
Ceramics Hard, brittle solids made by heating clay or similar materials in a kiln Pottery, brick
Plastics Materials that are polymers, electrical insulators and flexible Polythene, PVC
Glasses Hard, brittle solids that are often transparent  
Fibres Long threads made from manmade or natural materials Wool, cotton and nylon

Link to homework activities

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