Corrosion

Which metal is expected to be in the best condition after years of exposure to the elements?

• Gold ring

• Copper pipe

• Iron nail

• Aluminum toy

What is the primary reason iron corrodes faster than copper or gold?

• Iron is less dense

• Iron is more reactive

• Iron is heavier

• Iron is more expensive

Why doesn't aluminum corrode as quickly as iron, despite being more reactive?

• Aluminum is more expensive

• Aluminum is heavier

• Aluminum is less dense

• Aluminum forms a protective oxide layer

What is the process called when iron is coated with zinc to prevent corrosion?

• Rustproofing

• Electroplating

• Galvanizing

• Anodizing

Which method is NOT mentioned as a way to prevent corrosion on a bike?

• Painting the frame

• Using a plastic cover

• Greasing the chain

• Covering with a thin layer of gold