1. Inside
Materials

2. Crystalline Structure
• This is a regular structure
• Very similar to marbles in a
dish
• It is formed when a liquid is
cooled slowly

4. Polycrystalline Structure
• This is a more regular structure seen in metals
• It is made up of a series of grains, all
orientated in a different direction.

5. Amorphous Structure
• This is formed by
quick cooling
• Especially noticeable
in structures like
glass

6. The Brittle Nature of Glass
• In the 1920s research
showed that most materials
are almost 1,000 times
weaker than they should
theoretically be.
• This is thought to be as a
result of tiny cracks in the
material, which magnify
stresses.

7. Prince Rupert’s Drop

8. Polarisation