technological materials, tools and wood

technological materials, tools and wood

1. raw materials

   • products extracted directly from nature
   • they may be of plant, animal or mineral origin. Also air and water
   • others: oil or natulas gas

2. natural and processed materials

   • are applied to raw materials, also know as natural resources, to turn them into processed materials
   • example of more compkex onjects: the wood from trees is made into planks, which are used to build furniture.
   • artifial or synthetic

3. the properties of materials

   • hardness, mechanical resistance, toughness, brittleness, elastcity, plasticity

4. tools

   • humans used their hands as tools
   • they only depended on obtaining the right materials to make the tool theu wanted