OCR 21st Century Science: Chemistry 1 For those who are doing OCR. 3.5 / 5 based on 5 ratings ? ScienceChemistryGCSEAll boards Created by: Julia RobertsCreated on: 24-05-12 18:43 What percentage of Argon is in our air? 1% 1 of 6 What causes acid rain? Sulfur dioxide 2 of 6 Scientists use fossils and carbon dating to do what? Helps them find out the age of different rocks 3 of 6 What is the equation for complete combustion? Methane + oxygen - carbon dioxide + water 4 of 6 MOT test is a bad way of cleaning up pollution? True 5 of 6 Compounds of hydrogen and carbon are called? hydrocarbons 6 of 6
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