AST101H1 Lecture Notes - Archaeoastronomy, Ice Skating, Angular Momentum
6 Dec 2012
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AST101H1 Full Course Notes
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Baby lets go of ball it falls, she drops something it falls too: through the power of observation, the baby learns about the physical world, finding that things fall when they aren"t supported. One day she lets go of a helium balloon - it rises: understanding of nature is reversed, not everything falls, but mostly everything does. Sci. is a way of learning about nature through careful observation and trial-and-error experiments. Develop. of sci. is a gradual process for humanity. Begins in central africa, where ppl. made observations on weather based on the moon: watching movements of moon to see when rainfall would come. Used changing positions of sun, moon and stars to keep track of time/seasons: crucial for agriculture industry. Determining the time of day: in daytime, ancient ppl. would tell time by observing sun"s path through the sky. Used shadows cast by sticks to tell time.
