PLEASE STAND FOR PRAYER!
God grant me the serenity to accept the things I cannot change; the courage to change the things I can;
and wisdom to know the difference.
­­Reinhold Niebuhr
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SHOW THAT I AM READY AND ORGANIZED
Binder
Concepts
Homework
Pencil and Pen
Calculator
Class/Lab Notebook
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Objective: SWBAT:
• Convert between different SI units.
• Identify Significant Figures and explain why they are Significant.
Homework:
*Also BRING IN YOUR PROBLEM SOLVING EXERCISES TOMORROW*
• Conversions & Sig. Figs worksheet
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Slash and Burn Method
1st What are the most common base units?
Mass
Distance Volume (liquid)
Time
gram (g) meter (m)
Liter (L)
seconds(s)
2nd What are the most common prefixes?
• Kilo ­ bigger than base units • centi ­ smaller than base units
• mili ­ smaller than base units
3rd What is the glue that connects them to the base unit?
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Examples:
• Convert 8 s to ms.
• Convert 16 km/s to m/s
• Convert 384 centigrams to kilograms
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Significant Figures
Thought Experiment
Question: How tall is he?
Hypothesis/Prediction: I think he is 2 meter tall.
Experiment: Tools: • 1 Meter stick accurate to .5 a meters
• 1 Meter stick accurate to .5 a centimeters
• 1 Meter stick accurate to .5 a millimeters
• 1 Meter stick accurate to .5 a nanometers
Analysis: • What is his height?
________ ________
_______
• Which is the most accurate height?
_______
• Which is gives more accuracy than is possible by the instruments?
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Significant Figures allow you and other scientist to know how good your instruments are so that your data is meaningful.
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