What kind of change causes iron to rust

it would be oxidation

Explanation:

when water combines with air and has contact with iron. it rusts over a short period of time. there fore Oxdiation.

Moisture around the iron's surroundings can cause the iron to rust

Explanation:

Rust is the oxidized form of iron. Iron rusts because it combines with oxygen. The oxygen needs moisture as a catalyst and reactant to accelerate the reaction, so in the absence of moisture, iron won't rust. So the thing that causes iron to rust is the presence of water or moisture from which the iron can take the oxygen it wants

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