1. MATERIAL WORLD METAL & WOOD Presentation By Group 4 Members: Avanish
Nicholas
Ryan
Vignesh

2. METALS Metals form a major part of materials in the world
Common metals: e.g. Iron, Aluminum, Gold, Copper etc.
Humans have discovered 86 metals till now
Remaining Metals : 79

3. PROPERTIES Density - Generally High State – Mostly solid
Malleability – High
Thermal Conductivity – High
Electrical Conductivity – High
Magnetism – some metals

4. METALLURGY 3500 BC Science of extraction of metals.
Source – Found on earth as ores
Extraction - Mining

5. APPLICATIONS PAST PRESENT
Coins Drainage Tools War craft
Jewelry Make-up Utensils
Construction Transport Space engineering Power Plants etc etc..
Now…. Can you name any industry which does not use metals?.....

6. WOOD What is Wood? Organic Material Source : Trees Properties of Wood
Good Insulator
Low Density
Durability
Permeability
Low Flexibility

7. CLASSIFICATION
Soft wood
(Homogeneous)
Hard wood
(Heterogeneous)

8. TYPES OF WOOD Soft wood Hard wood Pine Hemlock Fir Redwood Spruce
Cedar
Mahogany
Walnut
Oak
Cherry
Rosewood
Teak

9. APPLICATIONS PAST PRESENT
Fuel
Scare animals
Housing
Carvings
Sculptures
Agriculture
Tools, Wheels, Buckets
Furniture
Canoe
Exterior timbers
Ground contact
Fresh water equipment
Marine timbers
Flooring
Gas treatment plants
Paper
Railway sleepers
Now…. Do you think our race can survive without wood?

10. Bibliography Metals Wood http://en.wikipedia.org/wiki/Metal
Matthew Cole, 2008, Science Diversity, Singapore Pearson Longman
Ho Peck Leng, 2008, I-science Diversity, Singapore EPB Pan Pacific
Kate Bedford, 2005, Our World Wood, Great Britain Aladdin Books Ltd.
Wood
Mini Science Encyclopedia – Manhattan Press