Evidence for the origins of life on Earth 0.0 / 5 ? BiologyEvolutionIGCSEAQA Created by: Nicole DCreated on: 24-02-14 13:07 Evidence for the origins of life on Earth 7 Questions 1 of 9 What is the main form of evidence for the origins of life on Earth? Fossils 2 of 9 What are fossils? 'Remains' of organisms from hundreds of thousands of years ago 3 of 9 Where are fossils found? Preserved in rocks, ice and other places 4 of 9 There are 4 main ways how a fossil can be formed: . 5 of 9 1. Mud sometimes preserves the softer tissues --> stops decomposition 6 of 9 2. Tracks in mud are dried. They are then filled with sediment. 7 of 9 3. Fossilised in hardened tree sap 8 of 9 4. Dead remains fall into sea and become buried ; They harden ; Compressed by rocks ; Rocks brought to surface ; Land movements expose fossils 9 of 9
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