physics saat ch1: science of physics

what is physics

branch of science that studies matter and energy and their properties and interactions

what are the branches of physics

mechanics

heat

light

energy

sound

radiation

electricity

magnetism

structure of atoms

whats the step to changing variables in a physics equation

manipulating variables

what is the scientific method

a method that is used to explain natural phenomena in scientific words

scientific method in other words

a process that combines observing, asking questions, and formulating hypothesis to explain natural world phemomena

steps of the scientific method

observe and ask questions

research

hypothesis

experiment

analyze data

present conclusion

retest (usually by other scientists)

hypothesis

a testable guess or explanation that describes how variables are related to each other. the validity of a hypothesis can be proved by an experiment

examples of hypothesis

students who eat breakfast are likely to perform better on a math test

hypothesis can be described as a

testable explanation

scientific law

an explanation for natural phenomena in the world that has usually been agreed on by other scientists

examples of scientific laws

keplers laws of planetary motion

newtons laws of motion

universal law of gravitation

law of conservation of mass

scientific theory

an explanation as to how and why things work. it is based on data

how do scientists develop theories

through changes in the natural world

examples on scientific theories

theory of relativity

difference between hypothesis and theory

conclusion

what does the conclusion state and what should it have

measurement

accuracy

precisiom

the common method of testing a device adjustment and accuracy

precision depends on:

what is the right position to look at an object from a height

difference between accuracy and precision

how to find precision

scalar quantities + examples

vector quantities + examples

basic units (SI) and their symbols

derived units + examples

any quantity not in the basic quantities is considered

prefixes

list the prefixes from 10^-1 → 10^-18

list the prefixes from 10^1 → 10^18

from bigger to smaller unit

from smaller to bigger unit

weeks to days to hours to minutes to seconds

seconds to minutes to hours to days to weeks

to convert from km/h to m/s

to convert from m/s to km/h