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What is Physics?

What is Physics?. Objectives. Compare and contrast hypothesis, theory and law. 12.1.1.a Know the steps of the scientific method. 12.1.1.b Distinguish between control, independent and dependent variable. 12.1.1.c Distinguish between the different areas of physics.

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What is Physics?

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  1. What is Physics?

  2. Objectives • Compare and contrast hypothesis, theory and law. 12.1.1.a • Know the steps of the scientific method. 12.1.1.b • Distinguish between control, independent and dependent variable. 12.1.1.c • Distinguish between the different areas of physics.

  3. The study of the physical world. • Mechanics • Motion & its causes, object interactions • Thermodynamics • Heat & temperature • Wave phenomena • Repetitive motions • Optics • Light (reflection, refraction, etc.) • Electromagnetism • Magnets, electricity, light • Relativity • Particles at very high speeds • Quantum Mechanics • Submicroscopic behavior

  4. Galileo • Most famous for using the telescope to prove the heliocentric model of the solar system. • Aristotle thought that heavier objects fall faster than lighter ones • Galileo said um . . . No.

  5. Define “theory” • An idea that explains a phenomena and is supported by many experiments. • Define “law” • A statement or formula that accurately predicts events • Define “hypothesis” • An educated guess hypothesis theory law

  6. Chubby Bunny Data

  7. Parts of An Experiment • Independent Variable • The thing you are testing. • Dependant Variable • The thing you are measuring. • Constant • All the stuff you keep the same. • Control • Something to compare your results to.

  8. Remember A good experiment tests ONE independent variable at a time

  9. Objectives • Students will be able to make a decent graph. 12.1.1.h,g,f • Students will be able to identify the appropriate SI base units. 12.1.1.f,l • Students will compare and contrast qualitative and quantitative data. 12.1.1.e

  10. The English System of Measurement • Grew out of the creative way that people measured for themselves • Familiar objects and parts of the body were used as measuring devices.

  11. English System • Length • 12 inches (in) = 1 foot (ft) • 3 feet  = 1 yard (yd) •  5280 feet = 1 mile (mi) • Weight • 16 ounces (oz) = 1 pound (lb) • 2000 lb = 1 ton • Volume • 16 tbsp = 1 cup (c)8 ounces (oz) = 1 c2 c = 1 pint (pt)

  12. YUCK!

  13. Metric System (SI) pg 18 • Based on powers of 10 • Base Units

  14. The Power of 10

  15. Now Try These! • 1.    What is the prefix for 1000?2.    What does the prefix deci represent?3.    What is the prefix for .001?4.    What does the prefix centi represent?5.    What is the prefix for 100?

  16. Metric Conversions

  17. Types of data • Qualitative • Descriptions of what is happening. • James I laughing while he says “Chubby Bunny” • Quantitative • Numbers or quantities • James could fit 7 marshmallows in his mouth.

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