2. Scientific Math

3. Accuracy v. Precision Accuracy-closeness of measurements to the correct value Accuracy-closeness of measurements to the correct value Precision-closeness of a set of measurements Precision-closeness of a set of measurements

4. Scientific Notation Numbers are written in the form M x 10 n Numbers are written in the form M x 10 n M is between 1 and 10 M is between 1 and 10 N is a whole number N is a whole number

5. Adding/Subtracting Scientific Notation Must have same exponent Must have same exponent Add or subtract M factors Add or subtract M factors Exponent may remain the same or have to be adjusted Exponent may remain the same or have to be adjusted

6. Multiply M factors are multiplied M factors are multiplied Exponents are added Exponents are added

7. Division M factors are divided M factors are divided Exponent of denominator is subtracted from numerator Exponent of denominator is subtracted from numerator

8. Direct Proportions Two quantities are directly proportional if dividing one by the other gives a constant value Two quantities are directly proportional if dividing one by the other gives a constant value

9. Inverse Proportion Two quantities are inversely proportional when their product is constant Two quantities are inversely proportional when their product is constant

10. Significant Figures Non Zeroes are significant Non Zeroes are significant

11. Zero Rules Leading Zeroes do not count Leading Zeroes do not count –0.0025 has two significant numbers

12. Zero Rules Captive Zeros count as significant Captive Zeros count as significant –1.008 has four significant numbers

13. Zero Rules Trailing zeros only if the number has a decimal Trailing zeros only if the number has a decimal –100 has one significant number –1.00 x 10 3 has 3 significant numbers