Scientific Method

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 dUnites
• Internationally agreed
• 75 000 not 75, 000
• Meters not miles
• Liters not gallons

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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

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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

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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

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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.

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Percent error

• Accepted value experimental value divided by
  the accepted value.
• Accepted literature, known value
• Can be negative

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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.

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• 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?

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

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Conversions

• King Henry Chart
• Remember