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Objectives

Objectives. Demonstrate ___________ ____________ Use of the metric system Evaluate answers using dimensional analysis Perform arithmetic operations using scientific notation. Vocabulary. Physics Dimensional Analysis Significant Digits Scientific Method Hypothesis Scientific Law

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Objectives

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  1. Objectives • Demonstrate ___________ ____________ • Use of the metric system • Evaluate answers using dimensional analysis • Perform arithmetic operations using scientific notation.

  2. Vocabulary • Physics • Dimensional Analysis • Significant Digits • Scientific Method • Hypothesis • Scientific Law • Scientific Theory

  3. What is Physics? • A branch of science involving the study of the physical world and how they are related. • _________ • _________ • Physicists: ______________: • Motions of electrons, rockets, energy in sound waves, electrical circuits, and the structure of the proton and of the universe.

  4. Use Math! • Equations for modeling observations and making predictions.

  5. SI Units • Systeme International d’Unites, or SI system.

  6. SI Units

  7. Dimensional Analysis • http://www.alysion.org/dimensional/fun.htm • Method of treating units as algebraic quantities, which can be cancelled.

  8. Significant Digits • The valid digits in a measurement called _______________ _________. • Last digit given for any measurement is the ________________digit. • All nonzero digits in a measurement are __________________.

  9. Scientific Methods • The rules and procedures for testing a hypothesis! • ____________: An educated guess that is a testable statement. Also has to be a proposed answer to the question or prediction. • __________rule of nature that sums up related observations to describe a pattern in nature. • _____________: an explanation based on many observations supported by experimental results

  10. Measurement • A measurement is a comparison between an _________________quantity and a ________

  11. Precision vs. Accuracy • ____________: the degree of exactness of a measurement is precision. • ____________: describes how well the results of a measurement agree with the “real” value; the accepted value by experimenters.

  12. Graphing

  13. Independent Variable • What you are ____________to the experiment to _________a ______________. • The factor that is changed or _____________ during the experiment • ALWAYS GOES ON THE _____ AXIS

  14. Dependent Variable • What you are going to _____________after adding the _________________variable. • What is going to _________as a result of your ________________variable. • The factor that depends on the ___________ variable.

  15. Best Fit Line • Model for predictions than any one point that helps ______________the line.

  16. Linear Relationships • When the line of best fit is a _______line, there is a linear relationship between ______ variables. • Relationship can be written as an _________. Y = ____________ ____= y intercept m = ________

  17. Slope • The ratio of vertical change to ___________ change. _______change = “rise” = ∆y = (y2 – y1) _________change = “run” = ∆x = (x2 – x1)

  18. Nonlinear Relationships • _________relationship between two variables Y = ax2 + bx + c

  19. Inverse Relationship Y = a __

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