metal

• What is a significant metal mentioned in the material?

  Copper
• What is copper primarily used for?

  In electronic equipment such as phones
• What is the term for the amount of metal in an ore that makes extraction economical?

  Economical
• What is the problem with copper ores mentioned in the material?

  Copper ores are becoming scarce
• What do low-grade ores contain?

  A very small amount of copper
• What is the first method of extracting copper mentioned?

  Phyto mining
• How do plants contribute to phyto mining?

  They absorb metal compounds and concentrate them
• What happens to the plants at the end of phyto mining?

  They are harvested and burned
• What does the ash from burned plants contain?

  A relatively high concentration of metal compounds
• What is the second method of extracting metals mentioned?

  Bio leaching
• What do bacteria do in bio leaching?

  They carry out chemical reactions to produce leachate
• What does leachate contain?

  A metal compound that we want
• What is done after extracting the metal compound from low-grade ore?

  The metal is extracted from the compound
• How can copper be extracted from its compounds?

  By displacing it using iron
• Why is scrap iron used for copper extraction?

  It is cheap
• What is another method to extract copper besides displacement?

  Electrolysis
• What are the key points about phyto mining and bio leaching?

  • Economically extract metals from low-grade ores
  • Earth's metal ore resources are limited
  • Do not involve large-scale digging or transporting