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EVOLUTION Who was Darwin & what did he do? Scientific Vocabulary Study of Evolution.

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Presentation on theme: "EVOLUTION Who was Darwin & what did he do? Scientific Vocabulary Study of Evolution."— Presentation transcript:

1 EVOLUTION Who was Darwin & what did he do? Scientific Vocabulary Study of Evolution

2 Charles Darwin 1859 published life’s work “The Origin of Species” Evolution based on Natural Selection Evolution: historical phenomenon of species changing & diversifying over time Natural Selection: how evolution happened

3 Darwin’s Evidence Biogeography Paleontology Embryology Morphology

4 Biogeography geographical distribution of living creatures

5 Paleontology extinct life forms revealed in fossil record

6 Embryology comparison of the physiological stages embryos pass through during development

7 Morphology comparison of anatomical shapes in different species

8 Today’s Evidence Fossil Record Homologous Structures Analogous Structures Vestigial Structures Geographical Distribution Embryology Biochemistry* Population Genetics* Molecular biology* Genomics*

9 Controversy & Evolution US Statistics Scientific Vocabulary

10 The United States says... “God created human beings pretty much in their present form” (55%) “Divine intervention got things started & evolution was the means” (27%) “Humans evolved from other life forms with no involvement from a god” (13%) Gallop Poll of 2900 people 2006

11 Scientific Vocabulary to help understanding... Define the following words: FACT HYPOTHESIS INFERENCE LAW THEORY

12 FACT An observation that has been repeatedly confirmed and for all practical purposes is accepted as “true” Truth in science, however, is never final and what is accepted as a fact today may be modified or even discarded tomorrow

13 Hypothesis A tentative statement about the natural world leading to deductions that can be tested If the deductions are verified, the hypothesis is provisionally corroborated. If the deductions are incorrect, the original hypothesis is proved false and must be abandoned or modified. Hypotheses can be used to build more complex inferences and explanations.

14 Inference Conclusion drawn from available evidence

15 Law A descriptive generalization about how some aspect of the natural world behaves under stated circumstances

16 Theory A well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses

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