An activity involving physical exertion and skill that is governed by a set of rules or customs and often undertaken competitively. b. often sports (used with a sing. verb) Such activities considered as a group: Sports is a good way for children to get exercise.
Rust is Iron Oxide. Hence, any warnings concerning the ingestion of iron may apply. Ingesting too much iron, whether it be via rust, suppliments, or otherwise, can lead to unpleasant symptoms including nausea and vomiting. Long-term side affects such as liver damage can be associated with excessive iron intake.
Rust is our common name for the corrosion result of the oxidation of iron or steel. Most unalloyed iron or steel is readily oxidized by water and oxygen to make rust. If there is enough free water, the reaction can produce iron hydrates and hydroxides such as Fe2O3.nH2O, FeO(OH), and Fe(OH)3.