Content Page• Message from us • Discovery of metal & wood• Properties of wood• Properties of metal• Uses of wood in past & present• Uses of metal in past & present• Last messageCredits to:CALEB,RYAN YEO,NIGEL,NICOLE&ZHONG HAN

FROM:THE YOUNG SCIENTIST

Message from us

• We will be presenting metal and wood . So open your eyes & ears to see & listen to our facts!(unless you forgot to bring them)

• We will be presenting metal and wood . So open your eyes & ears to see & listen to our facts!

WOOD METAL

Discovery of materials

WoodNo idea of when ,who& how

it was discovered.Man first used it when he

picked it up.

MetalProbably discovered by

accidentGold-6000bcCopper-4200bcSliver-4000bcLead-3500bcTin-1750bcIron-1500bcMercury-750bcRhodium-1803-1804

Properties of wood

• Strong • Quite soft• Non-waterproof• Not bendable• Float on water• Bad conductor of heat• Bad conductor of electricity• Non-flexible

Properties of metal

• Excellent conductor of heat

• Non-flexible

• Sink in water

• Hard

• Strong

• Waterproof

• Solid at room temperature(except mercury)

• High melting point

• Malleable

• Excellent conductor of heat(for some metals)

• Bendable when heated

• Not easily broken

USES of WOOD in PAST & PRESENT

PASTSome of the earliest uses of

wood were fuel for heating &cooking.Even today,this accounts the highest demand & use of wood in many developing countries.As industrial technology advances, wood was more frequently in exterior structural applications.Wood was also used to make boats & spears.

PRESENT• To make furniture• To make fences• To make spoons,

chopsticks& toothpicks• To make paper• To make flooring• To make wood chips for

decorations• To produce heat• To make bamboo sticks

for hanging clothes

Uses of metal in past and present

PAST• To make coins• To make weapons• To make jewelry• To make tools• To make armor• To make combs• To make art• To beautify• To make decorations• To construct things

PRESENT• Make machines /jewelry

/musical instrument• Connectors of electrical cables

like audio,video & USB cables• Dental fillings(sliver&mercury• Manufacture of

computers/communication equipment/jet aircraft engines/spark plugs

• Steel for construction of buildings

• Watch making• Photography

LAST MESSAGEThank you for your attention

SOURCEShttp://www.purpleslinky.com/Trivia/Science/Five-Most-Precious-Metals-and-Their-Amazing-Uses.149553/2

http://goliath.ecnext.com/coms/gi 0199-1167354/Past-present-future-of.html

http://neons.mems.cmu-edu/cramb/Processing/history.html

http:en.wikipedia.org/wiki/Wood

http:en.wikipedia.org/wiki/Metal