AST251H1 Study Guide - Midterm Guide: Cenozoic, Micropaleontology, Orion Nebula
7 Mar 2014
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Scientific method: make observations (look, ask a question, suggest a hypothesis (come up with rules, make a prediction (look more carefully/differently/elsewhere to test rules, perform a test: experiment or additional observation. If rules fail, go back to step 2: hypothesis: tested observationally/ experimentally, model: system of hypotheses and produces specific, testable predictions, theory: a system of models which are known to work. Science: seeks explanations for observed phenomena that reply solely on natural causes, progresses through creation & testing of models of nature that explain the observations simply, makes testable predictions about natural phenomena. Model must be revised or abandoned if predictions do not agree with observations. Occam"s razor: the simpler of two models or hypothesis is the better" one . Light year: distance light travels in 1 year; 9. 46*1012 km. Universe calendar: (37. 8 million years/day; 1. 58 million years/hour; 438 years/second)
