An iron gate is left outside. After several months the gate is covered in rust.
Name the two substances from the environment that are needed for iron to rust.
Rusting is one example of corrosion.
Complete the sentence.
Corrosion is the destruction of materials by chemical reactions with substances in the .................... .
Give one method of preventing the gate from rusting that works by forming a barrier.
40 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.