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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 message. Credits to:CALEB,RYAN YEO,NIGEL,NICOLE&ZHONG HAN FROM:THE YOUNG SCIENTIST. Message from us.

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  1. 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 message Credits to:CALEB,RYAN YEO,NIGEL,NICOLE&ZHONG HAN FROM:THE YOUNG SCIENTIST

  2. 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

  3. Wood No idea of when ,who& how it was discovered. Man first used it when he picked it up. Metal Probably discovered by accident Gold-6000bc Copper-4200bc Sliver-4000bc Lead-3500bc Tin-1750bc Iron-1500bc Mercury-750bc Rhodium-1803-1804 Discovery of materials

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

  5. 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

  6. PAST Some 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 morefrequently 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 WOOD in PAST & PRESENT

  7. 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 Uses of metal in past and present

  8. LAST MESSAGE Thank you for your attention SOURCES http://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

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