Chapter_1_-_Part_II_Outline

Chapter_1_-_Part_II_Outline - Chapter 1 Part II Scientific...

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Chapter 1 Part II
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Scientific Theories general explanation of important natural phenomena Developed through extensive observations and experiments Results are reproductible and reliable still subject to change Nothing is carved in stone New information & technology Some Biological Theories Atomic Theory = everything is made of atoms Cell Theory = all living things have cells Theory of Evolution = all things come from altered forms of previous life
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not the same thing Hypothesis = an educated guess Based on observable evidence not well supported with data yet Theory = accepted explanation Based on extensive observations supported with lots of reproducible and reliable data Often referred to as a a “natural law” Hypothesis vs Theory Testing
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Science is based on reasoning Inductive reasoning process of creating a generaliation based on many observations and results and support it Ex: Cell theory observations that all living organisms are composed of 1 or more cells deductive reasoning process of generating hypotheses about the outcome of an experiment based on a well supported generalization or theory Ex: Cell theory supports idea that any newly discovered living organism would be composed of cells
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What is Life? Not easily defined! Dictionary definitions “The quality that distinguishes a vital and functioning being from a dead body” “The form of existence that distinguishes living organisms from dead organisms or inanimate matter …” Biologists define life Non-living organisms may have some, but not all
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Chapter_1_-_Part_II_Outline - Chapter 1 Part II Scientific...

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