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Message:: [QUOTE="kanga, post: 280211, member: 9270"]A good Science Fair project has several broad parts:-- Problem-- Investigation/Experimentation-- Analysis-- Conclusion PROBLEM: How does acid affect coinsEXPERIMENT: Drop coins into acidANALYSIS: Coins sort of dissolve and get smallerCONCLUSION: Acid and coins don’t do well together The above project would earn you nothing academically.What it needs is to be qualified and quantified.(And even at the level of detail I’m going to use, this would not be a college level Science Fair project. It is only an example.) PROBLEM: How do various acids in various concentrations affect coins PRE-PROJECT EXPECTED RESULTS:-- Various acids will affect coins differently (one conclusion will be ranking quantitatively their reactivity)-- Various concentrations will affect coins differently (higher concentrations will increase the reaction rate - quantify)-- [things like that] EXPERIMENT: Vary the types, concentrations, exposure times, coin type, etc.Keep accurate records and particularly make non-quantifiable observations such as “experiment caused the neighborhood to be evacuated.”Which brings up the point, you really need to have a good idea of what to expect if results could be hazardous. ANALYSIS: What were the results of the types, concentrations, exposure times, coin types, etc. [charts, graphs, etc.]What were the reaction products (gases, solids, etc.) CONCLUSION: Acid and coins don’t do well togetherSources of acid contaminationPreventive methods[/QUOTE]

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