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Scientific Method

Scientific Method. Logical approach to solving problems Observing Formulating hypothesis ( testable statement) Test - experimentation Theorizin g –- model Publish results. remember. O H T T P Or OHEMP. vocabulary. Qualitative – non numerical information

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Scientific Method

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  1. Scientific Method • Logical approach to solving problems • Observing • Formulating hypothesis ( testable statement) • Test - experimentation • Theorizing –- model • Publish results

  2. remember • O • H • T • T • P • Or OHEMP

  3. vocabulary • Qualitative – non numerical information • Quantitative – numerical information • System – specific region of space, specific portion of matter, specific item of study. • Model – explanation of how something occurs, how data is related. Theory supported by data. • Theory – broad generalization that explains.

  4. SI Measurement • Le System international d’Unites • Internationally agreed • 75 000 not 75, 000 • Meters not miles • Liters not gallons

  5. Mass • kilogram is the standard • 1000 grams • We use grams – more useful in science class. • Mass measure of matter, does not depend on gravity • Weight – measure of the gravitational pull on the mass

  6. Other Units • Length – meter -- m • Liquid Volume –liter L • Solid Volume – m3 we use cm3 • Time – seconds -s • Vocab – • Derived unit – combination of units like in velocity m/s2, or pressure kg/m s2 • Density - g/cm3 or g/mL

  7. Mass and weight • mass is the amount of matter and will not change with location • Weight is a measure of gravity and will change with location

  8. Density • D = m/v • Ratio of mass to volume • The mass divided by the volume • Physical property

  9. vocabulary • Qualitative – non numerical information • Quantitative – numerical information

  10. Accuracy and Precision • Accuracy – refers to the closeness of measurement to the accepted value. • Precision - How close all the data points are that are measured in the same way.

  11. Percent error • {Accepted value – experimental value} divided by the accepted value. • Accepted – literature, known value • Can be negative

  12. conversions • Need a conversion factor.-- Two quantities that equal each other, but are in different units. Unit you want to get rid of is in the denominator, the unit you want is in the numerator.

  13. How many inches are in 3 yards? • How many seconds are in 2 days? • How many hours are in 4 months? – (use a 30 day month) • How many books are in 3 boxes of 2 dozen each?

  14. 3 main ideas from the week?.... • Something new I learned…. • How do I want to study….

  15. Conversions • King Henry Chart • Remember

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