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 G 109 1 000 000 000

mega M 106 1 000 000

kilo k 103 1 000

That’s it! You’re welcome!

All the < 1 PrefixesPrefix 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 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

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