Timeline 1

Metals

By kidir
  • Period: 219,800 BCE to 3000 BCE

    Stone Age

    The Stone Age was a broad prehistoric period during which stone was widely used to make implements with an edge, a point, or a percussion surface. The period lasted roughly 3.4 million years. Innovation of the technique of smelting ore ended the Stone Age and began the Bronze Age. The first most significant metal manufactured was bronze, an alloy of copper and tin or arsenic, each of which was smelted separately.
  • 6000 BCE

    Gold

    Gold
    Gold is the easiest of the metals to work. It occurs in a virtually pure and workable state, whereas most other metals tend to be found in ore-bodies that pose some difficulty in smelting. Gold’s early uses were no doubt ornamental, and its brilliance and permanence (it neither corrodes nor tarnishes) linked it to deities and royalty in early civilizations .Gold - found uncombined in nature
  • 4200 BCE

    Copper

    Copper
    Although various copper tools and decorative items dating back as early as 9000 BC have been discovered, archaeological evidence suggests that it was the early Mesopotamian who, around 5000 to 6000 years ago, were the first to fully harness the ability to extract and work with copper. Copper- extracted in a ancient copper kiln
  • 3500 BCE

    Lead

    Lead
    Lead (/ˈlɛd/) is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. ... Lead is a relatively nonreactive post-transition metal. Lead- Lead minerals extracted in a stone furnace.
  • Period: 3000 BCE to 2500 BCE

    Copper Age

    The Chalcolithic period, or Copper Age, was an era of transition between the stone tool-using farmers of the Neolithic and the metal-obsessed civilizations of the Bronze Age. The Copper Age was really a phenomenon of the eastern Mediterranean regions, and occurred from roughly 3500 to 2300 BCE.
  • 2500 BCE

    Bronze

    Bronze
    The discovery of bronze enabled people to create metal objects which were harder and more durable than previously possible. Bronze tools, weapons, armor, and building materials such as decorative tiles were harder and more durable than their stone and copper ("Chalcolithic") predecessors. Initially, bronze was made out of copper and arsenic, forming arsenic bronze, or from naturally or artificially mixed ores of copper and arsenic. Bronze- is an alloy( made from copper and tin)
  • Period: 2500 BCE to 1000 BCE

    Bronze Age

    The Bronze Age is a time period when bronze replaced stone as the preferred material for making tools and weapons. This led to improvements in agriculture and brought with it changes in the way people live. Some groups of Bronze Age people developed early writing and other important advances included irrigation, the wheel and the potter’s wheel. Different societies entered the Bronze Age at differing times. Some of the best known Bronze Age civilisations include those of the ancient Egypt.
  • 1500 BCE

    Iron

    Iron
    Iron has been known since ancient times. The first iron used by humans is likely to have come from meteorites. Most objects that fall to earth from space are stony, but a small proportion, such as the one pictured, are ‘iron meteorites’ with iron contents of over 90 percent. Iron corrodes easily, so iron artifacts from ancient times are much rarer that objects made of silver or gold. This makes it harder to trace the history of iron than the less reactive metals.
  • 1400 BCE

    Steel

    Steel
    Steel is an alloy of iron and carbon, and sometimes other elements. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.
    ron is the base metal of steel. Iron is able to take on two crystalline forms (allotropic forms), body centered cubic and face centered cubic, depending on its temperature.
  • Period: 1000 BCE to

    Iron Age

    The Iron Age is the final epoch of the three-age division of the prehistory and protohistory of humanity. It was preceded by the Stone Age and the Bronze Age. The concept has been mostly applied to Europe and the Ancient Near East, and, by analogy, also to other parts of the Old World.

  • Titanium

    Titanium
    Titanium was discovered in Cornwall, Great Britain, by William Gregor in 1791 and was named by Martin Heinrich Klaproth after the Titans of Greek mythology. The element occurs within a number of mineral deposits, principally rutile and ilmenite, which are widely distributed in the Earth's crust and lithosphere;