Glass

Question 1

Glass Ingredients

Answer 1

1. Sand - pure form is polymer
2. Soda ash - sodium carbonate
3. Limestone - calcium carbonate - found of limestone, marble, or chalk

Question 2

Glass recyclability

how long it takes to turn to sand

Answer 2

infinite times (cullet)

1 million years

Question 3

Characteristics of Glass

Answer 3

Transparency
Chemically neat
Non-toxic
Biocompatibility
Hardness
Brittle
Aesthetic Appeal
Electrical insulator
Cheap

Question 4

applications of glass

Answer 4

windows, containers, lighting, lenses.

fibre glass, containing nuclear waste, protective layer in solar cells

Question 5

Different types of glass

Answer 5

• Glass fibre
• Lead glass
• Commercial glass (soda-lime glass)
• Borosilicate glass (pyrex)

Question 6

Laminated glass

Answer 6

Different layers

glass - PVB interlayer - glass

oven then vacuum to make
- 4x stronger

Question 7

Toughened Glass

Answer 7

materials heated at high temperature, then cool rapidly (tempering)

• 4x stronger

(safety glass)

Question 8

How it breaks

Answer 8

Float glass (floats on tin) - breaks into big pieces

toughened glass - breaks into tiny pieces

Question 9

how to make

Answer 9

materials are heated up and put through conveyer then gets put on liquid tin bath to spread evenly then comes off and goes into rollers when hard.

Question 10

Stained Glass

Answer 10

by cutting coloured glass into shapes, putting them into a design using metal strips and soldering the joints. Windows are made by fitting these panels into a supportive frame.