Physics

What is physics? The basics of all sciences. It involves motion, forces, energy, matter, heat, sound, light, and the composition of atoms

Force, speed, acceleration

Light and Sound

Why math?  Math acts as a universal language  We can measure various things temperature, size, weight, speed, etc  We can then compare and analyze these measurements

Scientific Method  Recognize the problem/ ask a question  Make a hypothesis- an educated guess as to why an event happens  Predict the consequences/ outcome  Create an experiment to test the hypothesis

Important differences Hypothesis One possible cause a phenomenon Must be testable Can be supported or refuted based on the evidence Ex. If students study, then they will receive better grades compared to students who didn’t study Theory A hypothesis or group of hypotheses that have been well tested and are supported by a lot of evidence Ex, The theory of evolution Law Hypotheses that have been tested over and over again and not contradicted. There seems to be no evidence disproving the phenomenon. Ex, Gravity

Presenting data  Needs to be organized  Normally needs some sort of graph or figure

Measurements  We will almost always be using metric  Need to be accurate- close to the actual/ true value  Need to be precise-need to have similar values for each trial  Bias-Differ from the actual value  Repeat trials to get more precise results

Accuracy, Precision, Bias

Why metric  It’s universal  It’s easy once you get used to it  Everywhere else in the world uses it (mostly)

Metric System

Really. Everyone else uses it  USA  Liberia  Myanmar  These are the only countries that don’t use metric

Limitations  Can only be as accurate as the device

Technology  Computer  Calculator  Sensors  These allow us to be more accurate

Error  Could be from human error  Something could have gone wrong  Misread the instrument  The instrument could be off