Earth and it's Atmosphere GCSE Chemistry AQA Unit 1 Changes in the Earth and it's atmosphere. 4.0 / 5 based on 8 ratings ? ChemistryThe earth and its atmosphereGCSEAQA Created by: Honey02Created on: 22-04-12 10:16 What are the 2 main gases in air and what are their percentages? Nitrogen 78%, Oxygen 21% 1 of 6 The first organisms on Earth were thought to have formed in/on....? in the ocean 2 of 6 The Primordial Soup Theory suggests that Earth began in a ocean/pond and then a form of energy created Amino acids which are the basis for life? True 3 of 6 Fractional Distillation of Air involves: Cooling air until it is a liquid then heating it again 4 of 6 The Structure of the Earth is: Inner core, Outer core, Mantle, Crust 5 of 6 The continents must have been joined at sometime in the past because: Similar rocks are found at the edge of different continents 6 of 6
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