METALS

METALS

1. What are metals?

   • Chemical elements that are found as minerals in their natural state

2. Tipes of metals

   • mercury
   • gold
   • lead
   • silver
   • tin
   • copper
   • iron

3. Properties of metals

   • they reflect light, wich gives them a metallic shine
   • most metals are grey or whitish color
   • they can be mixed with other metals and substances to improve their properties
   • they are good conductors
   • they are very dense
   • all metals (except mercury),are solid at room temperature

4. Obtaining metals

   • metals are obtained in underground mines

5. Environmental problems

   • mining spoils the landscape
   • it alters the soil structure
   • blastingproduces dust and smoke pollution
   • some metal and refining processes are toxic
   • sound pollution

6. Metalworking tools

   • drilling tools
   • filing tools
   • cutting tools