11 19 What Are Conversion Factors
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Transcript of 11 19 What Are Conversion Factors
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Launch: 11/19 Grab your binder and immediately take a seat!
Place homework (balancing buffet) on desk.
__C + __Br2 __CBr4
1. When the equation above is completely balanced, the coefficient for Br2 would be
a. 0
b. 1
c. 2
d. 4
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Launch 11/19 __Na + __H2O __NaOH + __H2
2. When the above equation is completely balanced, the coefficient for NaOH would be
a. 1.
b. 2. c. 4.
d. 8.
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Announcements Quiz tomorrow!
Study hard tonight on balancing equations Reactants, products
Balanced vs. unbalanced
Balancing
Points end next week and the competition is getting fierce Be engaged Be respectful
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What is a conversion factor?
Mr. Heffner 11/19/09
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What are units? Units are…
ways to measure quantities
a.k.a. “Units of measurement”
Examples: grams (g) liter (L)
meter (m)
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What are conversion factors? Conversion factors are…
used to convert from unit to another unit.
Example: 1 Little Cesar’s pizza = 8 slices
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What are conversion factors? We can show conversion factors as fractions:
1 Little Cesar’s pizza = 8 slices
1 pizza 8 slices
8 slices 1 pizza
or
Same thing, just flipped!
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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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Whiteboards Work in pairs
Trade-off marker every question
You have 60 seconds to draw the answer Show all three steps!
Lift board only when prompted
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How many trifles are there in 1 wazoo?
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How many bamboos are there in 2 wickets?
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How many gidgantics are there in 4 bamboos?
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How many bamboos are there in 10 gidgets?
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How many bizbastics are there in 8 wazoos?
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How many bamboos are there in 500 wazoos?
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Exit Slip 1. Which of the following is not a way to show the
relationship between pizzas and slices.
a.
b.
c.
d. 1 pizza = 8 slices
1 pizza 8 slices 8 slices 1 pizza
12 pizzas 1 dozen
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Exit Slip 2. Which of the following is a correct way to show the
conversion factor 1 gidget = 5 wazoos?
a.
b.
c.
d.
5 wazoos 1 gidget 1 wazoo 5 gidgets 5 gidgets 1 wazoo
5 gidgantics 1 wazoo
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Exit Slip 3. Which of the following conversion factors would need
to be used to convert from wickets to bamboos?
a.
b.
c.
d.
1 wazoos 5 gidget
1 bamboo 5 gidgets 1 wicket
10 bamboos 5 wickets 5 wazoos
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Exit Slip 4. How many trifles are there in 2 wazoos?
a. 2 b. 4
c. 8 d. 16
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Exit Slip 5. How many bizbastics are there in 2 wazoos?
a. 2 b. 4
c. 8 d. 16
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Homework Finish practice question worksheet