science

Is blood a substance or mixture? Is iron a substance or mixture? I think blood and iron are both substances but my friend thinks that blood is a mixture and iron is a substance. PLEASE HELP ME!!!!!!


Substance is a very general term. Every piece of matter in the universe is a substance. On blood, tell your friend to define mixture. Did you read the links I left you? Try reading and make your own judgement:
http://www.google.com/search?as_q=mixtures+elements+compounds&hl=en&num=10&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&as_sitesearch=&as_rights=&safe=images

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asked by Gabby

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