Agenda 1) Warm-Up 5 min 2) Toy Car Lab Due! 3) Review Speed & Velocity Quiz 15 min 4) Physics Vocab. Words 10 min 5) Practice Graphs! 10 min 6) Sig. Fig Notes 20 min 7) Sig Fig WS 20 min Km HOMEWORK CHECK: Place on your desk: *calculator *Orange homework chart *Toy Car Lab, if you did not finish in class.

1.Position-time graph: graph that shows how position depends on clock reading or time. 2.Slope: ratio of the vertical separation of 2 points on a curve or rise, to the horizontal separation of the points, or run; rise divided by run; change in distance/change in time. 3.Velocity-time graph: plot of velocity of an object as a function of time.

 Numbers are based on measurement made in the lab.  Our data is only as good as the measurements we make and the instruments we use.

 Something that has a magnitude size or amount  Ex. Length, mass, volume

 One system for all scientists around the world;  We must have a standard for comparison length-meter (m) mass- kilogram(kg) time- second (s) volume – liter (L)

 Added to base units to represent large or smaller quantities SI PrefixUnit Abbreviation Exponential Factor kiloK10 3 hectoh10 2 dekada10 1 BASEm,g,L10 0 decid10- 1 centic10- 2 milli m10 -3 Kiss Her Daily Because Divorce Costs Money

 10 g = ____________mg? K h da b d c m 10,000

 14.6 dL= __________ kL K h da b d c m

 Shows how PRECISE a measurement is  Indicates the QUALITY of the instrument you use (how sensitive or exact) EX. Graduated cylinder vs. beaker

 Used to write really LARGE or really small #’s  Why? To save space & time

 Written in the form of mX10 n  m: > or equal to 1  AND <10 EX: 1.0X10 3

 Step 1) Determine the sig figs  106,000,000  Step 2) Determine the value of M using the sig figs  1.06  Step 3) Add the 10’s multiplier  1.06 x 10 n

 Step 4) Determine the value of “n” by counting the number of times you move the decimal in the original number to get the value for “M”  Step 5) Determine the sign of “n” by looking at the direction that you moved the decimal in the original # to get the value or “M”  If you move the decimal to the left in the orginal # “n” is positive  If you move the decimal to the right from the original #, “n” is negative

 Multiplication/Division  1) Multiply/ Divide using original numbers  2) Report answer using the same # of sig figs as the least precise measurement in the problem

 -Digit to the right is ≥ 5: Round UP  -Digit to the right is<5: Round DOWN

1) Add/subtract with original numbers 2) Report answer using the same # of decimal places as the least precise measurement in the problem.

DUE TODAY: Vocab. Chart (KEEP) Sig. Fig Notes (KEEP) Sig. Fig WS DUE NEXT CLASS: Finish SIG FIG Assignment CALCULATOR Binder/folders/CALCULATOR “The world is the great gymnasium where we come to make ourselves strong.” Swami Vivekananda