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Learning the Past Concept Check

Learning the Past Concept Check

Q After going through the Interactive website, submit your answers to the questions here! Interactive Website: Using the Scientific Methods to Study Human Evolution (Links to an external site.) • What is the principle of Superposition? • What is the principle of Association? • What does it mean to say that fossils were deposited at the same time? • What is radiocarbon dating? Radiopotassium dating? • What is a testable question? (use one of the examples in the interactive to explain what a testable question is). • How are scientists able to be confident in their conclusions? (use one of the examples in the interactive to explain how scientists gain confidence in their conclusions).

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The law of superposition is a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence. In another word, the principle states that in an undisturbed sequence of deposits, the older deposits are more deeply buried and younger deposits are more shallowly buried, younger towards the top. The Principle of Association corresponds to the correlation involving a high degree of consciousness and modifiability as well as the occurrence of two or phenotypic characteristics together, that is, things found in the same sediment are of the same age.