Matter

Ch.1. The nature of Science; Measurement Systems; Symbols and Equations PHYSICAL SCIENCE Physical - about our physical environment; Physics, Chemistry, Geology, Meteorology Science - a body of knowledge AND a method hypothesis - a tentative explanation; needs testing by a controlled experiment scientific law - important relationship observed in nature; occurs consistently (example: The Law of Universal Gravitation) scientific principle - specific set of relationships (example: The Archimede's Principle) model - gives an idea of …

…both sides of the equation Symbols and Equations; Proportions Equations: describe a property (e.g. r) define a concept (e.g. force, work) show how quantities change (aµ b or aµ 1/b) Examples: Prob.8: A cubic tank holds 1000 kg of water. What are its dimensions in m? Modification: How much water is contained in a cube with a=1m? Example on p.19: Hg has r = 13.6 g/cm3. What is the mass of 10.0 cm3 of Hg?