1. Metrics Conversions
SI Units: Length ___, Volume ___, Mass ___, Time___
Kilo Hecto Deka Unit? Deci Centi Milli-
(k?) (h?) (da?) (?) (d?) (c?) (m?)
ex. km hm dam m dm cm mm
Convert the following:
4.2hg  ___________dag
0.35cL ___________L
500. mL ___________dL
6900 dg  ___________kg
107m ____________hm
dam ___________mm

2. Percent Error = Actual-Theoretical x 100
Accuracy & Precision
DRAW
Accuracy Precision
Percent Error
Percent Error = Actual-Theoretical x 100
Actual
John uses his thermometer and finds the boiling point of ethyl alcohol to be 75o C.  He looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78oC.  What is his percent error? Ans = 3.8%
The density of water at 4oC is known to be 1.00 g/mL.  Kayla experimentally found the density of water to be g/mL.  What is her percent error? Ans = 7.5% 

3. Density Density = Mass Volume
1. An iron cube that weighs 7.9kg measures 10cmX10cmX10cm. What is its density?
Ans. = kg/cm3
2. A block has a mass of 20g and measures 2cmX4cmX2cm, will it sink or float?
Ans. = sink
3. What volume of silver metal will weigh exactly g. The density of silver is 10.5 g/cm3. Ans. = 238 cm3
4. Find the mass of mL of benzene. The density of benzene is g/mL.
Ans. = g

4. Sig Figs Rule 1 – all non-zero digits are significant
Rule 2 – all trapped zeros are significant
Rule 3 – all zeros to far left of non-zero digits are NEVER significant
Rule 4 – all zeros to far right of non-zero digits are ONLY significant
if there is a decimal somewhere in the number.
How many sig figs?
6.0 x 104
3.905
0.02 x 10-9
700,000
10.0

5. Sig Figs in Measurement
What is the name of this lab equipment?
___________ ___________ ___________
Adding the uncertain digit on the end AND including units…What is the measurement?
___________ ____________ ____________

6. Sig Figs/Scientific Notation in Calculations
Convert the following. Put answer in scientific notation.
3.09 x 104 cg  mg
x 10-3L  kL
x 102 dam  hm
4. How many sig figs for #1-3 above?
x and / …round answer to smallest # of sig figs given
32x400 =
525/10.=

7. Factor Label (aka dimensional analysis)
Given: 2.54cm = 1 inch, 5280ft = 1 mile
1. There are .621 miles in one km. How many km is it to “Wendy’s”
if the distance is 2.3 miles? Hungry yet? Answer: 3.7km
2. A good milk cow can produce 19 gallons of milk per day. If a
typical family consumes 0.80 gallons of milk a day, how many
cows are needed to provide for 5 families? Answer: .2cows
3. How many feet are in 1742 meters? Answer: 5715 ft
The speed limit in Canada on most freeways is 120km/hr. How
miles/min. is this? Answer: 1.2 miles/min

8. Graphing Graph the following using your good graphing rules!!
Temperature (x-axis) vs Enzyme Activity (y-axis)
Temperature
(*C)
Enzyme Activity (m/sec) 20 10 30 14 40 18