# Physical Science 1

 Data Measurement information that can be used to describe objects, conditions, events, or changes. Referent Vague References. You refer to, or think of, a given property in terms of a more familiar object. Tools What you can hold, or observations (patterns) Objects Things that can be seen or touched SI Standard International What do each of these measure? Meter Kilogram Kelvin Second Ampere Mole Candela Meter: lengthKilogram: massKelvin: temperatureSecond: timeAmpere: currentMole: amount of a substanceCandela: luminosité Metric system is based on the # ___ 10 A cube only measures ___ side, but you can determine ____ & _____. 1 sideAreaVolume is density based on quantity? No The bigger the density, the more ____ mass As mass increases, so does _____ Density As density increases, so does ___ Mass T/F  If you cut a block of platinum in half it's density decreases? False, density never changes What the the symbol for density? P = density Math terms: Direct Inverse Proportionality Numerical Direct: when 1 thing changes another changes in the same direction.Inverse: One goes up, one goes downProportionality: How many liters of gas per hourNumerical: Number that is constant i.e.: Pi Before science & experiments it was all ____ Thinking Condensed scientific method Collecting observationsDeveloping explanationsTesting explanations Hypothesis tentative explanation for some observation Experiment recreation of an event or occurrence to test a hypothesis Controlled experiment Fixed set for comparison.The best because you know which factors influence. Pseudoscience False Science T/F Principles are more specific than laws True T/F Theory has lots of validity & are rarely overturned True A model is useful in what 2 instances? When something is too small, or too big, to be seen What is the formula for slope? Y1 - Y1______ X1 - X2 ___ ____ is required for any change in a state of motion. Net force Friction When one thing goes over another Motion Change in position, explaining how change comes about & being able to apply it Are speed & velocity the same thing? No What are the 3 basic concepts of motion? PositionSpeed & Velocity (not the same thing)Acceleration What do Newton's laws of gravitation do? Govern movement of all particles. To measure motion you must have what 2 things? Change in positionChange in time What are 3 important combinations of legnth & time (needed for motion)? SpeedVelocityAcceleration What is the formula for speed? Vector shoes _____ & ______ DirectionMagnitude The ____ the arrow, the longer the magnitude arrow Arrows symbolize ______ Magnitude Speed can stay the same, but you accelerate if you ___ ____ change directions T/F Stopping is acceleration TrueIt is negative acceleration symbol for "final" and symbol for "initial" Final: fInitial: i What is the formula for average velocity? (the v has a line over it)f means: finalI means: initial Who were the first 2 people to experiment? Galileo & Newton The direction you are moving is = ____ ____ Your mass (your weight).Think tug of war If there is movement, there is a a ___ ___ of ___ Net Movement of Change What are the 4 fundamental forces? GravitationalElectromagneticWeak forceStrong force The ____ from an object the less gravitational pull it feels, and vise versa. further Inertia Measure of an object's tendency to resist changes in its motion (including rest) The more ___, the more inerta mass In space you must ____ force or you would never move. accelerate The longer something falls, the ____ __ ___. What causes this? Faster it goesDue to gravity Terminal Velocity When you reach a set point where gravity & airflow (velocity) balance, & you can't go any faster unless you change body shape. Acceleration is the same for all objects when? In the absence of air Aerodynamics How air impacts you What is the formula for distance? What does each symbol mean? d = distancea = accelerationt = time What is the symbol for the force of gravity? g What are the 3 types of motion? Vertical motionHorizontal motionCombination of vertical & horizontal (think football arch) Projectile Motion Any motion not restricted to the ground. It's shooting through the air. The longer the vector, the ____ it goes faster If you fire, or drop an arrow which hit the ground first? They will hit at the same time What are Newton's 3 laws of Motion? The law of inertia: object will not change it's motion unless acted on by something else (unbalanced force)2nd Force causes accelerations: more force, more acceleration.3rd Relates forces between objects: whenever 2 objects interact, the force exerted on one object is equal in size & opposite in direction to the force exerted on the other object. Formula for Newton's 2nd law of motion? What do the symbols mean? force = mass x acceleration(newton) = kg x meters per second2 If ___ goes up, force & acceleration go down, and vice versa mass ____ is the measurement of inertia (how much of you there is). ____ is the gravitational pull on your mass. MassWeight What is the difference between mass & weight? Mass is how much of you there is, while weight is the gravitational pull on your mass Formula for momentum p = mv (Density = mass x velocity) Why does a tennis ball hit the ground harder than a paper ball? Because the more mass, the more momentum. ______ is transformed though working or heating. Engery In energy is anything created, or destroyed? No What are the manifestations of energy? workmotionpositionradiation (sun/light)heat chemical & nuclear energymass itself Physics/work has to do with the _____ & the _____ to which you apply force. forcedistance What is the formula for work? W=Fdwork = force x distanceBroken down further it is:work = mass x acceleration x distanceMetric:Newton x Meter In Newton:  What is the formula for Joule? What does "Joule" stand for? Newton x meter = JouleJoule: mechanical energy Mathematically speaking: If you carry a box up and down a stair has any work been done? Why or why not? NoBecause you are not changing distance What is the simple distance formula? Findin=Foutdout Define Power Rate at which you workORRate at which energy is transformed Formula for Power P = W/t The smaller the time, the ____ power. The more work (Faster), the ____ power. More PowerMore Power In horse power: the _____ the number, the faster you can go. Bigger (Think cars) Which would have more power: Walking or running a mile? Which does more work? Running does more power & more work Movement is ____ _____ Kinetic Energy What is "energy"? What is "work"? Energy: the ability to do workWork: process of changing the energy level Potential Energy is the Energy of _____ Position Kinetic Energy can be changed into _____ Energy Potential Which is more important? Velocity or Mass? Velocity When stopping a car, kinetic energy increases by _____ 4 The more distance you cover, the more _____ ____ ___. work you do When you have full _____ energy you have zero ________ energy. And Vice Versa Full Kinetic Energy you have no Potential Energy, and vice versa Is nuclear energy a chemical reaction? NOInvolves splitting an atom What forms of energy can you convert to another form of energy? All forms of energy can be converted to another form of energy What are the 5 forms of energy? Mechanical Energy: Kinetic plus PotentialElectrical Energy: Charges, currents, etc.Chemical Energy: chemical reactionsRadiant Energy: Electromagnetic energy, visible lightNuclear energy: Involving the nucleus & nuclear reactions. T/F When swinging a pendulum, it never stops moving? FalseFor a split second it does not move. A pendulum is an example of what 2 types of energy? KineticPotential Most of our energy, up to _____% can be traced to ___________? 89%Photosynthesis Petroleum comes from __ ____ ___ Dead life forms Coal is Compacted plant material Why will we eventually run out of water? Because, while it is renewable, it easily escapes the atmosphere What are the 2 types of solar technologies and explain. Passive: use solar energy flow naturally. DIrect conversion of light to electricityActive: solar collector use to heat water, air, or some liquid. Mirrors focus to heat water for steam generation. What is an example of Geothermal Energy? Old Faithful Hydrogen is a biproduct of _____, turns back into _____, but is hard to split. from water, to water, hard to split water Authorconstance.siegel ID226821 Card SetPhysical Science 1 DescriptionPhysical Science 1 Updated2013-07-13T15:32:41Z Show Answers