Word: multistep
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Dates: during 1980-1989
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...Only 6% of 17-year-olds can handle algebra or multistep math problems...
...cited for developing methods that have revealed the most basic mechanisms of chemical reactions. To construct theories of what happens when chemicals react, scientists, prior to the laureates' work, had only sketchy evidence: the chemical products and the amount of energy produced or consumed by the end of a multistep reaction. But these observations gave information only about the net effect on millions of molecules; the changes that occur to individual molecules at each step stayed a mystery...