ok well for a science project i put steel, cooper, and aluminum in 3 different cups with salt water, im trying to see which rust the fastestThe metal has been in there for 2 days now and i think i should take it out but im not sureShould i take it out now? And how long do i leave it out to see if it rusts??Please help me its due thursday
Leave it in as long as you can before having to write up your findingsThat will maximize the resultsI don't think that two days is really long enoughOnly one metal is prone to rusting and that is the steelThe other metals have their own ways of oxidizingGenerally, copper turns dark brown and/or green as it oxidizesAluminum may get a white film but is the least susceptible to oxidation of the three.
Ricardo's answer is quite thorough, but there is evidence that the technology needed for weaving cloth goes back quite a bit further, all the way to the Neolithic cultures in Europe, ca 15,000 BCE (near the end of the last Ice Age)Archaeological finds in what are now Southern France suggest the use of crude loomsThey certainly were expert basket makers, and the leap from weaving of that sort to weaving cloth is certainly plausible, as suggested by the discovery of bone artifacts that appear to be shuttles for loom weaving Cheers
