Activity 6.1a – Material Properties Display

Metal - Gold

Mr. Heck

Section 1 - Categories of Materials

1. Organics

2. Metals and Alloys

3. Polymers

4. Ceramics

5. Composites

Category - Organic

• Organic means coming from a living source

• Examples include:

LEATHER(Car Upholstery)

BONE (Knife Handle)

ELMER’S GLUE (Milk Protein Glue)

Category – Metal/Alloy• Description:

Metal \Met"al\ (? or ?; 277), noun [F. m['e]tal, L. metallum metal, mine, Gr. ? mine; cf. Gr. ? to search after. Cf. {Mettle}, {Medal}.]

1. (Chem.) An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than acid properties, as contrasted with the nonmetals, or metalloids. No sharp line can be drawn between the metals and nonmetals, and certain elements partake of both acid and basic qualities, as chromium, manganese, bismuth, etc.

BRONZE ALLOY(Copper and Tin)STEEL ALLOY

(Iron and Carbon)COPPER

Category - Polymers

• Description:

• Examples:

Category - Ceramic

• Description:

• Examples:

Category - Composite

• Description:

• Examples:

MATRICS

Insulator Flammable Flexible Inert Transparent

Wood

Copper

Glass

Brick

Paper

Part 2 – Properties of a single material - Gold

• What makes gold unique?– It rare, and valuable– Gold resists corrosion– It is a good conductor of electricity

Gold computerparts

GoldJewelry

Gold DentalWork

Physical Properties of Gold

NaturalGold Crystal

Material Life Cycle - Gold

Gold Ore Mined

Ore is smelted into Gold ingots

Gold ingots areformed into “blanks”(wire, chain, sheets)

Consumer products are made from gold blanks

Product made from Gold are services(Jeweler, Dentist…)

“Useless” Gold itemsmelted down

For scrap

Section 3 – Answer the 2 Questions