PPT-Evolution Scientific Theories

What is a scientific theory In science the word theory applies to a welltested explanation that unifies a broad range of observations and hypotheses and that enables scientists to make accurate predictions about new situations. Variation in Living Things. SPECIES  - Group of organisms that interbreed. VARIATION - small differences between individuals of a species  . Some neither helpful nor harmful  . Some enable organism to be better suited to its environment.. a science class?. Unit questions:. What is the difference between the scientific community's and the general public's use of the word "theory"?. What is the Theory of Evolution?. Are there "alternative" theories to evolution, what are they, and are they valid?. Scientific Theory. Social use of the word “theory”. Not the same as in science. Implies a hunch or a casual guess. Scientific Theory. 1. Highly probable explanation based on vast collections of scientific data. Lauryn. . Langlois. Ashley Mooney. Debora Tolliver. What is Creationism?. Creationism is a theory that states that matter, life, and the world were created by God (or some other supreme being in different religions) out of nothing. . Geog1006. Ideas in Geography: . ‘The Scientific Method’ . (Part 2). Lecture 2. Is science rational and progressive?. Realism and instrumentalism. Inference to the best explanation. Criteria for theory choice. The Evolution-Creation Controversy. Robert Root-Bernstein and Donald L. . McEachron. i. n . Applying . Anthropology. . (2012:6-14). Difference between “I have a theory” and a . scientific theory. Exploration and Discovery: Where Ideas Come From. What scientific attitudes help generate new ideas?. 1) Scientific Attitudes. 2) Practical Problems. 3) The Role of Technology. Communicating Results: Reviewing and Sharing Ideas. A mechanism for change in populations.. Any change in the . inherited . traits within a population across generations. Individuals better adapted to their environment tend to survive and . produce more offspring. Mechanisms of concerted evolution. Unequal cross-over. Gene conversion: non-reciprocal transfer of information between homologous sequences; the main mechanism invoked to explain concerted evolution. Artificial selection increases life span in fruit flies. Inherent limits, or can lifespan evolve?. Fruit fly expt:. Female sockeye salmon defending its nest before dying. II. Fundamental Trade-offs. Mite Kiwi bird. mapping. Scientific Method. A . scientific theory. . is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Scientists create scientific theories from hypotheses that have been corroborated through the scientific method, then gather evidence to test their accuracy.. In the mid-1500s, scientists begin to question accepted beliefs and make new theories based on experimentation. The Roots of Modern Science. The Medieval View. Most knowledge in the Middle Ages comes from the Bible and Greek/Roman sources.. of . the Red . Queen. CfE. . Advanced Higher Biology. Unit . 2: . Organisms and Evolution. SQA mandatory key information. A change in the traits of one species acts as a selection pressure on the other species. . Science – study of the physical and natural world through observation and experiment. can be tested using the scientific method. Pseudoscience- Beliefs or practice where scientific method cannot be applied .