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technology: the correct use of tools. it should make our lives easier and or have fum it should improve our lives ergonomics: designing objects that help people with their jobs, environment, sports, safety, or involves people. system: an organised wayu to achieve a goal a system includes 4 parts 1. input 2. output. 3. process 4. feedback trade offs: all systems have trade offs 1 intended outcome (good) 2 unintended outcome (bad) the difference between science and tech. 1 science focues on the natural world 2 tech. focuses on making things easier inventions & inovations: invention: a new product inovation: an improvement tech. should use resources efficiently the 4 R's reduce reuse renew recycle the history of tech. agricultural - up to 1700's industrial - 1700's to 1950's information - 1950' to now resources we use in tech natural resources not man made. syntehetic resources: man made