Recycling Metals Quiz
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5 questions, one answer each
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1. Why is recycling metals important?
- A. Metal ores are unlimited
- B. Metal ores are a finite resource and extraction uses lots of energy
- C. Recycled metal becomes a new element
- D. Metals cannot be melted
2. What does 'finite resource' mean?
- A. A resource that regenerates instantly
- B. A resource that will eventually run out
- C. A resource found only in the ocean
- D. A resource that is always cheap
3. Which best explains why recycling aluminium saves energy compared with extraction?
- A. Aluminium recycling needs no heat at all
- B. Recycling avoids the electrolysis step needed to extract aluminium from ore
- C. Aluminium ore does not need mining
- D. Recycled aluminium is a different element
4. Which is NOT a benefit of recycling metals?
- A. Conserves finite ore resources
- B. Reduces energy use
- C. Increases the amount of mining needed
- D. Reduces landfill waste
5. A factory recycles scrap steel instead of extracting new iron from ore. Which combination of reasons best justifies this decision?
- A. Recycling is always required by law
- B. It conserves a finite resource and reduces the energy/CO2 cost of extraction
- C. Recycled steel is chemically a different, better material
- D. Extraction from ore produces no waste