Chemistry: Atmosphere 3.0 / 5 based on 1 rating ? ChemistryThe earth and its atmosphereGCSEWJEC Created by: TashaCreated on: 12-05-13 18:41 What were the gases produced in the original atmosphere caused by the erupting volcanoes? Carbon Dioxide (CO2), Water vapour (steam) and small amounts of Ammonia (NH3) 1 of 12 What happened when the Earth cooled? The water vapour condensed to form oceans and green plants then evolved 2 of 12 That controls the amount of Carbon Dioxide and Oxygen in the atmosphere? The Carbon cycle 3 of 12 What are the 3 names and uses of the processes involved with the answer to previous question? Photsynthesis; Takes in CO2 and gives out 02 Combustion; Takes in 02 and gives out CO2 Respiration; Takes in 02 and gives out CO2 4 of 12 What other reasons made the amount CO2 derease? Large amounts of CO2 dissolved in oceans and formed carbonate rocks 5 of 12 What did the increase in O2 result in? It produced the gas ozone (O3) and the ozone layer 6 of 12 What does this do? This layer filters out most of the harmful ultra-violet radiation from the Sun 7 of 12 What can this cause? Skin cancer 8 of 12 What happened when the simple animals appeared? They used up O2 to produce energy 9 of 12 What does the Ammonia from the volcanoes decompose to? Notrogen and Hydrogen 10 of 12 What happened to these two elements? The Hydrogen escaped the Earth but the Nitrogen remained 11 of 12 What is today's atmosphere now made up of? Give the % of each answer. Nitrogen; 78% Oxygen; 21% Argon; 09.0% Carbon Dioxide; 0.04% Other gases; 0.06% 12 of 12
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