JSS2: BASIC TECHNOLOGY – 1ST TERM Uses of Ceramics and Glass (Contd) | Week 7 & 8 Definition of Glass

Lesson 6, Topic 3

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Definition of Glass

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Topic Content:

Meaning of Glass

What is Glass?

Glass is a hard, usually transparent substance that easily breaks when hit. It is usually formed by melting and mixing sand and oxides of sodium or calcium-soda or limestone at a very high temperature of 3090°F (roughly 1700°C) and allowing to cool.

It can be coloured by adding some substances to it while in the molten state.

Making Glass — _{Glass is formed at high temperatures.}

Glass is useful in homes as:

Glass cups
Dressing mirrors
Ornamental decorations, etc.

Glass Cups — _{Glass Cups.}