Science Core 0.0 / 5 ? ScienceThe EarthGCSEEdexcel Created by: rebeccacthompsonCreated on: 13-04-15 19:25 What was the Early Atmosphere like? Little/no oxygen,as volcanoes don't release oxygen,they release water vapor and carbon dioxide 1 of 7 What are the two theories on how nitrogen was added to the atmosphere? Volcanoes, or the reactions of nitrogen which contained compounds released from volcanoes 2 of 7 Igneous Rock Molten rock cools and solidifies, interlocking crystals, granite 3 of 7 Small crystals They cool quickly 4 of 7 Big crystals They cool slowly 5 of 7 Sedimentary Rock Layers of sediment, compacted over time, contain crystals, chalk 6 of 7 Metamorphic Heat and pressure, marble 7 of 7
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