This document compares the specification learning outcomes from the legacy GCSE Twenty century Chemistry qualification to the new GCSE (9-1) in Twenty first century Chemistry. It shows where the statements in the old specification are covered in the new spec, indicates where they are no longer assessed and highlights where new content has been added. Spec Ref Original spec statement (21C Spec statement equivalent (reformed tick if no current spec) 21C spec) Spec Ref longer covered C1.1.1 recall that the atmosphere (air) that surrounds the Earth is made up mainly C1.1.4  of nitrogen, oxygen and argon, plus small amounts of water vapour, carbon use data to predict states of substances dioxide and other gases under given conditions C1.1.2 recall that air is a mixture of different N/A  consisting of small molecules with large spaces between them C1.1.3 recall that the relative proportions of C1.1.4 the main gases in the atmosphere are  approximately 78% nitrogen, 21% use data to predict states of substances oxygen and 1% argon under given conditions C1.1.4 describe the major sources of carbon monoxide and particulates (incomplete C1.1.7 understand that gases or combustion), sulfur dioxide (combustion  particulates may be released into the of sulfur impurities in fuels), oxides of atmosphere by human activity or by nitrogen (oxidation of nitrogen at high natural processes (e.g. volcanoes), temperatures and further oxidation in and that these can affect air quality the air) C1.1.5 understand how the Earth’s early C1.1.5 atmosphere was probably formed by  volcanic activity and consisted mainly interpret evidence for how it is thought of carbon dioxide and water vapour the atmosphere was originally formed C1.1.6 understand that water vapour C1.1.5  condensed to form the oceans when interpret evidence for how it is thought the Earth cooled the atmosphere was originally formed
This document compares the specification learning outcomes from the legacy GCSE Twenty century Chemistry qualification to the new GCSE (9-1) in Twenty first century Chemistry. It shows where the statements in the old specification are covered in the new spec, indicates where they are no longer assessed and highlights where new content has been added. Spec Ref Original spec statement (21C current spec) Spec Ref Spec statement equivalent (reformed 21C spec) tick if no longer covered C1.1.1 recall that the atmosphere (air) that surrounds the Earth is made up mainly of nitrogen, oxygen and argon, plus small amounts of water vapour, carbon dioxide and other gases C1.1.4 use data to predict states of substances under given conditions  C1.1.2 recall that air is a mixture of different consisting of small molecules with large spaces between them N/A  C1.1.3 recall that the relative proportions of the main gases in the atmosphere are approximately 78% nitrogen, 21% oxygen and 1% argon C1.1.4 use data to predict states of substances under given conditions  C1.1.4 understand that gases or particulates may be released into the atmosphere by human activity or by natural processes (e.g. volcanoes), and that these can affect air quality C1.1.7 describe the major sources of carbon monoxide and particulates (incomplete combustion), sulfur dioxide (combustion of sulfur impurities in fuels), oxides of nitrogen (oxidation of nitrogen at high temperatures and further oxidation in the air)  C1.1.5 understand how the Earth’s early atmosphere was probably formed by volcanic activity and consisted mainly of carbon dioxide and water vapour C1.1.5 interpret evidence for how it is thought the atmosphere was originally formed  C1.1.6 understand that water vapour condensed to form the oceans when the Earth cooled C1.1.5 interpret evidence for how it is thought the atmosphere was originally formed 
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