âSpoons come in many different sizes and are not precise enough to measure a childâs medication,â said pediatrician Ian Paul, MD, FAAP, lead author of the policy statement. âFor infants and toddlers, a small error â especially if repeated for multiple doses â can quickly become toxic.â.
Copper and bronze do not contain any iron, and only iron can rust (because rust is defined as iron oxide, a compound of iron and oxygen); so the answer is that steel will rust the fastest and copper and bronze will never 'rust'. But, yes, copper and bronze do tarnish, they do corrode.
(Any metal that is made of iron or steel will rust, metals like copper and silver will simply tarnish.) Students can revisit the examples of metal displayed at the beginning of the lesson and determine which metals will rust, which ones will tarnish, and support their answers with information from the text.