11 20 what are conversion factors part ii
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Launch: 11/19 Grab your binder and immediately take a seat!
Take out your notes and prepare for the quiz! What are reactants, products, coefficients, subscripts? What is the principle of conservation of matter? Is 2C2H6 + 7O2 4CO2 + 6H2O balanced?
What is the coefficient for H2O when the below equation is balanced: __H2O __H2 + __O2
Warning: We will start the quiz without study time if the room gets too noisy!
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Quiz! Good SAT behavior = up/down and no talking
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Announcements Points end next week and the competition is getting
fierce Be engaged Be respectful
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What is a conversion factor? – Part II
Mr. Heffner 11/20/09
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How are conversion factors used? There is a 3-step process:
1. Identify the starting and ending units. 2. Pick a conversion factor that has the starting units
on the bottom and the ending units on the top. 3. Multiply out.
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Activity Dimensional Analysis Cards
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Exit Slip 1. Which of the following is a correct way to show the
conversion factor: 100 millimeter (mm) = 1 centimeter (cm)?
a.
b.
c.
d.
10 mm 1 cm
100 mm 1 cm 1 cm 1 mm
100 cm 1 mm
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Exit Slip 2. Which of the following conversion factors would need
to be used to convert from seconds to minutes?
a.
b.
c.
d.
1 hour 60 minute
1 hour 60 minutes
1 minute 60 seconds 60 seconds
1 hour
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Exit Slip
3. Using the above conversion factor, how many centimeters (cm) are there in 2 meters (m)?
a. 2 cm
b. 20 cm c. 50 cm
d. 200 cm
100 cm 1 m
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Exit Slip 60 minutes = 1 hour
4. Using the above conversion factor, how many hours are there in 240 minutes?
a. 1 hour
b. 4 hours c. 24 hours
d. 60 hours
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Exit Slip 100 mm = 1 cm 100 cm = 1 m
5. Using the above conversion factors, how many millimeters (mm) are there in 4 meters (m)?
a. 40 mm
b. 100 mm c. 400 mm
d. 4000 mm
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Homework Finish practice question worksheet