A Math day

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Drill! Drill! Drill!
1 – Name two different things that a chemistry lab
neophyte might do their first time in the lab.
2 – Name 5 different things that a chemistry lab
veteran might do when they are in the lab.
Do this drill on the same piece of paper as your
previous drill.
A Math day
Math is fun!
The Metric System Base Units
Quantity
Unit
Unit symbol
Length
Meter
m
Mass
Gram
g
Time
Second
s
Amount
Mole
mol
Electric current
Ampere
A
Luminous
intensity
Candela
cd
All the > 1 Prefixes
Prefix
Symbol
Magnitude
Meaning (Multiply base unit by)
yotta
Y
1024
1 000 000 000 000 000 000 000 000
zetta
Z
1021
1 000 000 000 000 000 000 000
exa
E
1018
1 000 000 000 000 000 000
peta
P
1015
1 000 000 000 000 000
tera
T
1012
1 000 000 000 000
giga
G
109
1 000 000 000
mega
M
106
1 000 000
kilo
k
103
1 000
hecto
h
102
100
deka
da
10
10
nothing
no prefix means just the unit!
The > 1 prefixes we’ll actually use
Prefix
Symbol
Magnitude
Meaning (Multiply
base unit by this #)
giga
mega
kilo
G
M
k
109
106
103
1 000 000 000
1 000 000
1 000
That’s it! You’re welcome!
All the < 1 Prefixes
Prefix
Symbol Magnitude Meaning (Multiply base unit by)
nothing
No prefix = just the unit ****
deci
d
10-1
0.1
centi
c
10-2
0.01
milli
m
10-3
0.001
micro
μ
10-6
0.000 001
nano
n
10-9
0.000 000 001
pico
p
10-12
0.000 000 000 001
femto
f
10-15
0.000 000 000 000 001
atto
a
10-18
0.000 000 000 000 000 001
zepto
z
10-21
0.000 000 000 000 000 000 000 001
yocto
y
10-24
0.000 000 000 000 000 000 000 000 001
The < 1 prefixes we’ll actually use
Prefix
Symbol
Meaning
Multiply base unit by
deci
centi
milli
micro
nano
pico
d
c
m
μ
n
p
10-1
10-2
10-3
10-6
10-9
10-12
0.1
0.01
0.001
0.000 001
0.000 000 001
0.000 000 000 001
A few tricks of the trade before we
start today’s activity
• For the >1 prefixes  from big to small,
each prefix is 1,000 times bigger than the
previous one.
• For the <1 prefixes  starting after milli-,
each prefix is 1,000 times smaller than the
previous one (also going from big to
small).
A mnemonic for the >1 prefixes:
Good morning kids! Nothing!
Giga > mega > kilo > no unit
Part 1 of your homework is to think of a
different, better mnemonic.
A mnemonic for the <1 prefixes:
• No! Does camp make men not phat?
• No unit > deci- > centi- > milli- > micro- > nano > pico
• Part 2 of your homework tonight: Yup, you
each have to think of a better mnemonic than
me for this one too.
Good mnemonics:
• Are Funny
• Or really dumb
• Somewhat logical
• Can’t have extra words
• The individual that makes one up benefits the
most from it
What are we actually doing today?
Pull out your answers to last week’s lab stations.
Some of your measurements were made in pure
units with no prefixes (seconds & grams).
Some of your measurements were made in units
with prefixes (mL).
Ignore temperature measurements for this activity.
You are all shrinking…
Using my special
teacher powers I have
shrunk you all to the
size of Escherichia Coli
bacteria, about 1 μm.
If you want to return to your normal
human size, you must do this:
8 minutes:
• Convert each of your mass, time and volume
measurements to μg, μs and μL.
• Start with the measurements where you had no
prefixes (do mL conversions last).
• How? For now, you can just move the decimal
point. Soon we’ll learn another way.
Good job, you’re getting bigger
Oops! Too big! You are now as big as
the state of Texas, about 1 Mm
• 8 minutes:
• Convert each of your mass,
time and volume
measurements to Mg, Ms and
ML.
• Start with the measurements
where you had no prefixes (do
mL conversions last).
You can return to your human size
again, if you do some homework:
Due tomorrow:
• Make 19 measurements (metric) at home.
• Can’t have more than 5 of the same type
(no more than 5 masses, volumes, distance
& time measurements).
• Convert masses, volumes & times to bigger
and smaller unit of your choice.
Notebook Check this Friday:
• I will be looking for 4 sections:
–
–
–
–
Notes
Homework
Handouts
Projects & Labs
• Papers should be in the right location
• Notes should be dated
• Any work turned in should have
–
–
–
–
Desk #
Date
Name
Class & period
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