1) What is rust? a) A reddish-brown oxide on iron. b) A type of paint. 2) On which surface the rust mostly appears? a) Plastic. b) Iron and steel. 3) Is rusting reversible? a) Yes b) No 4) How can rusting be prevented? a) Use paint or keep dry. b) Soak in water. 5) What causes rust? a) Sunlight. b) Iron, oxygen, and moisture. 6) What metal does not rust? a) Copper rusts. b) Aluminum does not rust. 7) What happens to metal when it rusts? a) It deteriorates and weakens. b) It becomes stronger. 8) How long does it take for rust to form? a) It can form in a few days. b) It takes years to form. 9) What is a common rust remover? a) Water is a common rust remover. b) Vinegar is a common rust remover. 10) Is rust a solid or Liquid? a) Rust is a solid. b) Rust is a liquid

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