4.3 - Producing and recycling metals

What is the first step needed to obtain pure metal from an ore?

• The metal is extracted in pure form from its ore

• The metal is smelted to form a useful product

• The metal ore is processed to increase its metal content

• The metal is mined to extract the ore from the ground

The process by which raw materials are turned into manufactured goods

• purification

• recycling

• extraction

• production

The last step of a linear materials economy after it has been consumed

• production

• disposal

• recycling

• reuse

Which of the following steps are a part of a circular economy as opposed to a linear economy

• Recycling

• Disposal

• Production

• Use

Which of the following is not an issue associated with mining metals?

• Destruction of habitat

• Pollution of water

• Soil erosion and dust pollution

• Release of carbon dioxide gas

Which of the following is not true about recycling?

• More energy is required to recycle metal products than to process and extract it

• Less waste is sent to landfill

• Less CO₂ is released in the manufacturing process

• If the metal is in limited supply it is cheaper to recycle