1.  Put the following numbers into scientific notation 1.0.000098 (4 zeros) 2.10900000000 (8 zeros)  Perform the following operations using sig figs 1.19.6 x 2.89 2.29.3 / 35.08 3.17.85 – 5. 1  Convert the following using appropriate methods 1. 9.03 cm/s into km/h 2.2.7 yards into cm (2.54 cm in one in) 3.70900 mm to km  Find the density of a piece a metal that has a mass of 24.5 g and has a length of 2 cm, a width of 1.5 cm, and a height of 0.5 cm.  Find the mass of an iron nail that has a volume of 2.5 mL and a density of 4.7 g/mL.  Calculate the percent error that a student got if they found the density of a copper wire to be 8.9 g/mL but when they looked up the density, found it to be 9.2 g/mL

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3.  Bar Graph- shows how a quantity varies  Pie Graph- used to represent parts of a whole  Line graph- used to show the relationship between two variables

4.  Most used in chemisty  y-axis = dependant variable  X-axis = independent variable  Best fit line- straight line that touches as many points as possible

5.  Must have 3 things labeled on a graph  Title- needs to be descriptive  x-axis and y-axis ◦ Needs to include unit ◦ Must count by the same interval on respective axis but not necessarily count by the same interval on both axis

6.  The slope on a line graph can tell you a lot of information  Slope= rise/run  m=Δy/Δx  m=y 2 -y 1 /x 2 -x 1

7.  Graph the following data points ◦ (2, 5) and (7, 11)  Find the slope of the line