Final Jeopardy Question Number of Sig Figs Rounding 500 Mixed Math Multiply and Divide Add And Subtract Sig Fig Questions

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= 4

390.0 Back

390.0 = 4 Back

54001 Back

54001 = 5 Back

2500

2500 =2 Back

12 Back

12 = 2 Back

1 sig fig Back

5

5 Sig Figs Back

Back

4 Sig Figs Back

607.7 Back

2 Sig figs 126

Back 130

Back What is the process you follow to round to a certain amount of sig figs?

1) Count to the digit you are going to round 2) Look to the number to the right 3) If the number to the right is below 5 you leave the digit the same 4) If the number to the right is higher than you round the digit up 3) If the number to the right is 5… And digit is even then keep it the same And digit is odd then round it up to the next even number 4) If there are non-zero numbers after the 5 then round the digit up 5) Use zeroes as space fillers if they are needed. Back

1200 cm cm – cm Back

cm  1200 cm Back

23 g/mL g/mL g/mL Back

g/mL  25 g/mL Back

40 L L Back

L  40 L Back

3.05 g g

9.22 g  9.2 g Back

Explain the rule that is followed to round at the end of a calculation Back

1)Look to the numbers in the calculation 2)Find the least accurate number 3)Round answer to have same last decimal place of the least accurate number. Back

35.01 cm x cm x 14 cm x 10 cm Back

cm 4  200 cm 4

Back _ g_ mL

Back  g/mL

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m  1.14 m Back

12 g x 255 g

Back 3060 g 2  3100 g 2

Explain the rule to follow with sig figs when multiplying and dividing. Back

1) Count number of sig figs in each number 2) Make answer have same number of sig figs as the number with the least amount

Back (23 kg kg) ( m m) (7.05 L – 2.0 L) (120 s - 57 s)

Back 14.4  14 kg * m L * s

Back * (2.0 kg – 1.05 kg)

Back 22.8  23 kg 2 * m 2 s 2

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 10 cm * s

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 nm/s

Explain the rules we follow to use sig figs in mixed math problems Back

1)Follow PEMDAS to solve -Use rules for add/sub and multiply/divide when they apply P – Parenthesis E - Exponents and Roots M – Multiplication D - Division A - Adding S – Subtracting 2) Make answer have the same amount of sig figs as the number with the least amount Back

Explain why sig figs are used when making measurements and not counting. Back

Sig figs are only needed when there is an uncertain digits like when you are measuring. You are trying to make sure that your measurements are as accurate as possible. When you are counting there is no uncertainty. Back

Why is it important to average multiple trials during labs while using sig figs?

You are trying to minimize any error that occurred while making measurements in the lab. Back

Why do we round and use sig figs during measurements? Back

To account for any error that occurs and make sure our measurements are as accurate as possible. Back

How is rounding in math different than rounding in science?

Math – adding a point zero to a number doesn’t matter -accuracy is less important in a number -If a 5 is next to the number you are looking at the number rounds up -If a 4 or lower is next to the number you are looking at the number stays the same Science – adding more decimal places makes the number more accurate -all about making accurate measurements and accounting for error -zeroes count under certain rules -separate rules to round with 5’s Back

How are the rules for adding/subtracting different than the rules for multiplication/division? Back

Adding/Subtracting involves rounding the answer to match the same decimal place as the least accurate number in a problem. Dividing/Subtracting involves rounding the answer to match the number with the least amount of sig figs.

Back Explain how other techniques you used in the lab account for error?

Back -Percent error to see how accurate your data is and how much it was effected by error -Calculation of range and +/- amount to explain how much your data could be off the actual value.