Welcome to Physics--Jump in!. Chapter 1 Objectives Identify activities and fields that involve the...
Transcript of Welcome to Physics--Jump in!. Chapter 1 Objectives Identify activities and fields that involve the...
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Welcome to Physics--Jump in!
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Chapter 1
Objectives
• Identify activities and fields that involve the major areas within physics.
• Describe the processes of the scientific method.
• Describe the role of models and diagrams in physics.
Section 1 What Is Physics?
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What is
If it is living it is biology.If it is chemicals it is chemistryIf it is rocks it is geology
Physics is everything else and can be applied to biology, chemistry and geology, so…..
Physics is the study of just about everything!
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Okay, you want a proper definition:
Physics is the study of the interactions between matter and energy.
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Topics Covered:MechanicsElectricityMagnetismWavesPhysical OpticsThermodynamicsModern Physics
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Chapter 1
Physics
• The goal of physics is to use a small number of basic concepts, equations, and assumptions to describe the physical world.
• These physics principles can then be used to make predictions about a broad range of phenomena.
• Physics discoveries often turn out to have unexpected practical applications, and advances in technology can in turn lead to new physics discoveries.
Section 1 What Is Physics?
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Chapter 1
Physics and Technology
Section 1 What Is Physics?
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http://www.journalism.missouri.edu/images/news/2004/detrick-rollercoaster.jpg
Mechanics:The study of motion
KinematicsThe mathematical description of motion
1-D and 2-D motion
DynamicsThe study of the forces that cause motion
Newton’s LawsEnergyMomentumFluids
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http://talklikeaphysicist.com/wp-content/uploads/2009/03/physics-lolcat.jpg
ElectricityThe study of electric charge and the effects they cause.
ElectrostaticsStudy of the effect of charges collected and held in one place
Electric CurrentThe study of the effects caused by moving charge
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http://befreetech.com/images/refrigerator_magnets.jpg
MagnetismThe study of the magnetic forces created by moving charge
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WavesStudy of vibrational motion
Simple Harmonic MotionSound WavesElectromagnetic waves
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http://www.arachnoid.com/raytracing/images/intro_newton_prism_hi.jpg
Physical OpticsThe study of:
ReflectionRefractionLensesMirrors
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ThermodynamicsStudy ofHeat transferTemperature changeIdeal Gas LawsLaws of Thermodynamics
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Modern PhysicsStudy of the weird stuff
Wave Particle DualityPhotonsThe AtomNuclear PhysicsRadioactive decay
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Chapter 1
The Scientific Method
• There is no single procedure that scientists follow in their work. However, there are certain steps common to all good scientific investigations.
• These steps are called the scientific method.
Section 1 What Is Physics?
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Chapter 1
Models
• Physics uses models that describe phenomena.
• A model is a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.
• A set of particles or interacting components considered to be a distinct physical entity for the purpose of study is called a system.
Section 1 What Is Physics?
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The Scientific Method
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The Scientific Method
• Observe an unknown & ask A Question• Form Hypothesis (An educated prediction)• Experiment & Test Hypothesis• Collect Data• Analyze Results• Draw Conclusions & Communicate Results
*Remember the acronyms:
OHEDAC or OHEDACC
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** Key: Be a good observer.
observation inference
involves a judgmentor assumption
uses the fivesenses
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Types of Data
Observations are also called data.
qualitative data quantitative data
clear liquid --
-- e.g., e.g.,
descriptions
measurements 55 L or 83oC
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Parts of the Scientific Method
Observe & Identify an unknown (Ask a question).
Make a hypothesis: a testable prediction
Repeatedly experiment to test
hypothesis.
procedure: order of events in
experiment
variable: any factor that couldinfluence the result
(i.e., a recipe)
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A ScientificExperiment
conclusion: must be based on the data
Experiments must be controlled:
they must have at least two set-ups
that differ by only one variable
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Scientific Law vs. Scientific Theory
law:
Theory of Gravity,
Atomic Theory
states what happens
tries to explain why or
how something happens
-- e.g.,
does not change
law of gravity,laws of
conservation
never violated
-- --
theory:
-- e.g., -- based on current evidence
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RecapWhat is Physics?What is Physics?
– The study of natural phenomena The study of natural phenomena of basic things such as motion, forces, energy, matter, heat, sound, light, and the composition of atoms
2. What branches of science use physics?2. What branches of science use physics?– All branches!All branches!
3. What are the steps in the Scientific Method?3. What are the steps in the Scientific Method?*Remember OHEDAC*Remember OHEDAC
– Observe an unknown & ask A QuestionObserve an unknown & ask A Question– Form Hypothesis (An educated prediction)Form Hypothesis (An educated prediction)– Experiment & Test HypothesisExperiment & Test Hypothesis– Collect DataCollect Data– Analyze ResultsAnalyze Results– Draw Conclusions & Communicate ResultsDraw Conclusions & Communicate Results
4. What is the difference between a law vs. theory?4. What is the difference between a law vs. theory?– Law: States what happens Law: States what happens – Theory: Tries to explain why or how something happens Theory: Tries to explain why or how something happens
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Now what do you think?
What are some topics you expect to study this year in physics?
How do scientists discover the laws of physics?
Do the laws of physics ever change?
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Find a picture that you think is cool. Bring it in for a group activity tomorrow.
http://blogs.suntimes.com/cornerkicks/2009/04/
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In your group examine your pictures.
Identify the areas of Physics illustrated in your pictures-each picture may have more than one area in it.
Present and discuss with the class the areas of Physics your group has identified in the pictures.