Amorphous And Crystalline Solids
Chapter Name : The Solid State |
Sub Topic Code : 102_12_01_03_01 |
Topic Name : Amorphous And Crystalline Solids |
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Sub Topic Name : Amorphous And Crystalline Solids |
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Introduction
All solids in the universe are classified into 2 main categories.
Pre-Requisites:
Solids
Activity:
Different kinds of solids. Glass of very old buildings. Try and categorize solids around you into the 2 categories
Real Life Question:
In very old buildings glass panes are thicker at the bottom than at the top. Why?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Crystalline solids Amorphous solids anisotropy Cleavage property | Consists of many small crystals of a definite shape . Consists of crystals of irregular shape Some physical properties are different along different directions When you cut it with a sharp tool , you get plain & regular surfaces |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Compare the crystalline solid with a chessboard | It has a regular pattern repeating on all sides |
Real life uses :
All solids around us can be categorized into 1 of the 2 categories
Places to visit :
An old building
Practical examples around us
| Examples | Explainations |
|---|---|
| quartz Glass | Crystalline solid Amorphous solid |
What you learn in Theory:
Amorphous and crystalline solids
What you learn in Practice:
There are certain solids that flow (though very slow)