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By: By: Jordan Kidder Jordan Kidder& Zack Mead Period 6

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Conversion Factors Conversion factor- the process of taking a measurement and converting it into a different measurement unit either smaller or larger (ex: 1 meter = 100 centimeters) # unit # UNIT OR # UNIT # unit

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How to Apply Convert 1,050 km to cm To start you should know that 1 meter = 10^0. Therefore, 1 km = 10^3 And cm = 10^-2 Kmcm 10^310^-2 1050 km 1 X 10^3 cm 10^-2 km = 105,000,000 cm

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Significant Figures Significant figures- The digits in a measurement that carry meaning contributing to its precision; the quality of equipment. Absent (ocean) Present (ocean) U.S. 1.00 If decimal present, start from left and begin counting at the first non 0 digit and count every digit after If decimal absent, start from right and begin counting at the first non 0 digit and count every digit after 3 sig figs 100 1 sig fig Numbers that are absolute/counting numbers have an infinite number of significant figures. Ex: 2 apples = infinite sig figs

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Rounding Rounding- a numerical value means replacing it by another value that is approximately equal but has a shorter, simpler, or more explicit representation In multiplication & division: the rules of rounding is to round to the least precise measurement through significant figures 1.00 X 4.35971 3 sig figs 6 sig figs Since 2.0 has the least number of significant figures, we round the answer to 2 sig figs. 2.0 2 sig figs = 2.179855 = 2.2 In addition and subtraction: you round to the number with the least amount of digits past the decimal point. 6.9871 + 2.35 – 4 = 5

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Scientific Method 5 steps 1.Problem 2.Hypothesis (guess) 3.Experiment 4.Conclusion 5.Problem Solved yes no - Trial and error to solve a problem

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Applying the Scientific Method to Everyday Life 1.Problem: I am the 2 nd string quarterback on my varsity football team and I want to be the starter. 2.Hypothesis: If I ask the coach to start, I will become the new starter 3.Experiment: I ask the coach if I can be the new starter. 4.Conclusion: He laughs and declines my proposition 2.New hypothesis: If I learn the plays, I will become starter 3.Experiment: Everyday after practice, I go home and spend hours learning all of the plays until I know them all. 4.Conclusion: I now know the plays, but so does the starter and I remain backup. no No (cont. on next slide) 1.Problem: I am the 2 nd string quarterback on my varsity football team and I want to be the starter. 2.Hypothesis: If I ask the coach to start, I will become the new starter 3.Experiment: I ask the coach if I can be the new starter. 4.Conclusion: He laughs and declines my proposition

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Example of Scientific Method cont. 2.Hypothesis: If I get rid of the starting quarterback, I will then (by default) become starter 3.Experiment: The starting qbs dad happens to work for my dad, so I get my dad to transfer his dad to the Wisconsin branch, effective immediately. Thus, getting rid of the starter and his family 4.Conclusion: With the starter gone off to Wisconsin, I now become the starting quarterback (thanks dad!!) 5.Problem Solved (I become starter) yes

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Scientific Method: Theory or Law?? Scientific theory- a set of observations that is widely accepted, but not necessarily proven to be true Scientific law- an absolute fact that cannot be disproven The scientific method is a theory because while it is widely accepted in the scientific community, it is limited in that it cannot be proven to be 100 percent fact.

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Independent vs. Dependent Variables Independent Variables- A variable that you control in an experiment Dependent Variables- A variable that is directly affected by the independent variable in an experiment When creating a graph, the independent variable is labeled on the x-axis and the dependent variable is labeled on the y-axis independent dependent Independent is the constant in a graph Example: 2.03.04.05.06.0 1.32.94.14.96.2

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Independent vs. Dependent The title of a graph will always be labeled as the independent variable vs. the dependent variable Mass (kg)1.02.03.04.0 Length (cm)4.59.012.513.5 Mass (kg) Length (cm) Mass is the independent variable because its a constant and when we apply 1.0 kgs we then get 4.5 cms in response (dependent) and so on.

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Graphing Linear: y = mx Y always represents the dependent variable and X represents the controlled/independent Exponential: y = mx^2 Inverse: y = m/x The relationship between variables is directly proportional

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SECTION 2-3. Objectives 1. Distinguish between accuracy and precision 2. Determine the number of significant figures in measurements 3. Perform mathematical.

SECTION 2-3. Objectives 1. Distinguish between accuracy and precision 2. Determine the number of significant figures in measurements 3. Perform mathematical.

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