Science Word 2
Terms
undefined, object
copy deck
- testable questions
- question that can be ancwered through an investigation
- technology
- the opplaction of knowlege to improve human life
- physical science
- the study of Matter and Energy
- model
- idea, system or structure that shows what you are explaning
- critical thinking
- using certin skills to solve a problem
- observation
- using secience to get information
- hypothesis
- prediction
- theroy
- explanation based on obersvation suporting results
- scientific law
- rules fo nature
- green house effect
- heating the earth by the atmosphere trapping suns energy
- ozone layer
- part of the atmosphere that protects life on earth
- experament
- test
- control
- showing results relat to condition
- constant
- factor that doesnt change in an experament
- independent varible
- factor thats adjusted by experiment
- dependent varible
- depends on independent varible
- line graph
- used to show trend or continus change
- bar graph
- used for showing information collected by counting
- pie graph
- used to show how some fixed quantity is broken down into parts
- speed
- rate of change in pasition
- instantneous speed
- lazer that picks up speed
- constant speed
- same speed
- average speed
- total distance travled divided by total time travled
- velocity
- distance over time or direction
- acceleration
- rate of change in veloicty
- force
- is a push or pull one body exerts on another
- balance force
- force equal in size and opposite in direction
- net force
- always changes the volicty of the object
- inertia
- the tendancy of any object to resit any changes in its motion
- friction
- the force that opposes motion between two surfaces that are touching each other
- gravity
- every object in the universe exerts a force on ever other object
- weight
- most often used in refrance to the gravitonal force between earth adn a body at earths surface
- newtons law of motion
-
a net force acting on an object cause the object to accelerate in the direction of force f= m*a
*= mutiply - air restance
- in force air exerts on among objects. this force acts int eh opposite direction to that of the objects moton
- terminal velocity
- is the highest velocity that will be reached by a falling object
- projectile
- anything that is thrown or shot through the air
- centripetal acceleration
- accerleration towards the center of a curved or circular path
- energy
- the ability to cause change
- knetic energy
- energy in the form of motion KE=1/2mv2
- potential energy
- stored energy
- work
- the transfer of energy through motion. in order for work to take place a force most be exerted through a distance
- kinetic potential and work is measured in
- joules
- mechanical energy
- inthe moving things
- law of conservation of energy
- states that energy may change from cant be created or destrayed under ordinary conditions
- electromagnetic
- energy in moving electrons
- static electricty
- accumlation of electric charge in an object no current flows because the electring is static <motionless>
- electric feld
- force surrounding an electricon that affects anything near by that has an electric charge is stronged near the electron and weakness with distance
- conductor
- material that allows heat or elecrons to move easily through
- insolator
- a materal through witch heat or electricty cant move easly
- electroscope
- adevice used to detect preshur of electric dangers
- lighting rod
- metal rod mounted a top a structor and connected to earth to leak off electrly charged between clouds and earth before grow strong enough to cause lightning
- potential differance
- differance in electrical and potential energy between two points
- circut
- closed path through whitch electrons can flow
- current
- flow of electros through conductor meshured in amperes with m meters
- dry cell
- power sorce that generates current by chemical reaction. dry because it uses thick pasty electrolyte in a sealed contoiner insted of liquid elecrolyte as in a car battery
- wet cell
- power source that generates electric by chemical reaction wet because it used electrolyte as in a autombile batery
- resistance
- oposton to flow of electrons through conductor measured in ohms with ohmmetter
- ohms law
- german physicist Gerorge Ohm stated that electric current equals the potential diffrence or voltage divided by restance to current flow
- series curcut
- electrical circute where the current only flows in one path if it is interupted at any point it stops current flow
- parralle circut
-
current flow in several seperate branches if one branch is interupted
current still flows to teh others - electrical power rate
- of witch electrical is conected to another from of energy such as heat meshurd in kilowat hours
- kilowat hours
- unit of electrial power . 1 kilowatt 1000 wats of power in 1 hour