a mixture of copper and tin

(archeology) a period between the Stone and Iron ages, characterized by the manufacture and use of bronze tools and weapons

the earliest known period of human culture, marked by the creation and use of stone tools

Identify the order of the 'ages' of human development from earliest to latest.

shelter, axes, spears, tools

spears, bowls, baskets, fire

- coal, iron, steel, wool, cotton; and silk imports

clothes, bedding

needles, fish-hooks

- hundreds of new manmade materials, e.g. plastic, polythene, Lycra, nylon, rayon, etc.

is the substance used to make objects.

The ability of your muscles to exert a force.

The ability of an object to transfer heat or electricity to another object.

Allows you to see through the background

ability to take up moisture

the attraction caused by a magnetic force

The ability of a material to bounce back after being disturbed

the ability to move a body part through a full range of motion

the crystallization of molten magma or lava (intergrown crystals)

sediments, evaporation of water and organic remains

other rocks by the action of heat and/or pressure (recrystallization)

able to be molded, altered, or bent

a transparent and pliable film that can hold a coating of chemicals sensitive to light

Formulated celluloid plastics

Invented "Bakelite", the first practical inexpensive plastic

mixtures composed of two or more elements, at least one of which is a metal

A material that allows heat and electricity to pass through it.

A material that does not allow heat or electrons to move through it easily.

easy to shape or bend

impossible to see through; preventing the passage of light

Able to be passed or soaked through

not flexible

allowing light to pass through, but blurring it so that images cannot be seen clearly

(adj.) allowing light to pass through; easily recognized or understood; easily seen through or detected

The process by which ore is melted to separate the useful metal from other elements.