chemistry 0.0 / 5 ? ChemistryThe earth and its atmosphereGCSEOCR Created by: chrissieewalkerCreated on: 13-05-14 11:19 Which gas has the highest concentration in dry air? Nitrogen 1 of 10 Which gas varies in concentration with weather changes? water vapour 2 of 10 What is the source of most of the pollutants in the air? burning fuels 3 of 10 Which of these gases is not a pollutant gas? argon 4 of 10 The atmosphere of the early Earth was largely made up of carbon dioxide and water vapour 5 of 10 Which of these is improved by taking several measurements rather than one? reliability 6 of 10 For the data 13, 15, 12, 15, 12, 13 what is the range 12-15 7 of 10 For the data 24, 23, 26, 22, 25, 24 what is the mean? 24 8 of 10 What can the mean be used as? best estimate 9 of 10 In this set of results: 56, 58, 54, 42, 55, 56, which is the outlier? 42 10 of 10
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