Catalyst

Catalyst1. Set up your Cornell notes by:

a) Putting the heading (Metric Conversions) at the top left

b) Gluing the notes on the right side.

2. Answer the catalyst questions on your notes

ObjectivesSWBAT:

•Articulate six different prefixes scientists use with standard units.

•Convert between various units through practice.

Agenda•Catalyst•Metric system basics•Converting between units•Practice•Summary

Metric System Basics

Kilo(k)

hecto(h)

deca(D)

Base UnitsmetergramLiter

second

deci (d)

centi(c)

milli(m)

Units get smaller

Units get larger

Metric System Basics

• The three prefixes that we will use the most are:– kilo– centi– milli

Kilo(k)

hecto(h)

deca(D)


second

deci (d)

centi(c)

milli(m)

Metric System Basics• If you needed to measure length

you would choose meter as your base unit– Length of a tree branch

• 1.5 meters

– Length of a room • 5 meters

– Length of a ball of twine stretched out• 25 meters

Metric System Converting• But what if you need to measure a

longer distance, like from your house to school?– Let’s say you live approximately 10

miles from school• 10 miles = 16093 meters

– 16093 is a big number, but what if you could add a prefix onto the base unit to make it easier to manage:• 16093 meters = 16.093 kilometers

• These prefixes are based on powers of 10. What does this mean?– From each prefix every “step” is either:

• 10 times larger or

• 10 times smaller

– For example• Centimeters are 10 times larger than millimeters• 1 centimeter = 10 millimeters

Kilo hecto deca


second

deci centi milli

Metric System Converting

– Centimeters are 10 times larger than millimeters so it takes more millimeters for the same length

1 centimeter = 10 millimetersExample not to scale

1 mm

1 mm

1 mm

1 mm

1 mm

1 mm

1 mm

1 mm

1 mm

1 mm

1 cm

41

40 41

40


• An easy way to move within the metric system is by moving the decimal point one place for each “step” desired

Example: change meters to centimeters

Kilo hecto deca


second

deci centi milli

1.00 meter = 100. centimeters


• If you move to the left in the diagram, move the decimal to the left

• If you move to the right in the diagram, move the decimal to the right

kilo hecto deca

meterliter

gramsecond

deci centi milli


•Now let’s try our previous example from meters to kilometers:16093 meters = _________km

• So for every “step” from the base unit to kilo, we move the decimal 1 place in that direction


–How many steps are there from meters to kilometers?

Kilo hecto deca


second

deci centi milli

3 steps!


– In which direction are we moving?

Kilo hecto deca


second

deci centi milli

To the left


16093 meters = _________km

–We are moving 3 steps to the left

16093 mWhere is the

decimal to start with?


16093 meters = _________km


16093. Where is the



16093 meters = _________km


16093.


16093 meters = _________km


16.093


16093 m = 16.093 km


• Now let’s start from centigrams and convert to kilograms

400000 centigrams = ________ kilograms

Kilo hecto deca


second

deci centi milli


–How many steps are there from centigrams to kilograms?

Kilo hecto deca


second

deci centi milli

5 steps!


– In which direction are we moving?

Kilo hecto deca


second

deci centi milli

To the left


400000 cg = ________ kg


400000Where is the



400000 cg = ________ kg


400000.Where is the



400000 cg = ________ kg


400000.


400000 cg = ________ kg


4.00000


400000 cg = 4.00000 kgOR

400000 cg = 4 kg


• Now let’s start from meters and convert to centimeters

5 m = ____cm

Kilo hecto deca


second

deci centi milli


• How many steps and in which direction are we moving? m cm

Kilo hecto deca


second

deci centi milli

2 steps to the right!


Kilo hecto deca


second

deci centi milli


5. What do we do now?


Kilo hecto deca


second

deci centi milli


5. We add zeros when there is an empty

space


Kilo hecto deca


second

deci centi milli


5.00 We add zeros when there is an empty

space


Kilo hecto deca


second

deci centi milli


500.


5m = 500. cmOR

5m = 500 cm


NOW YOU TRYIn your notebook complete the following problems:

125 s = _____ ms324 dl = _____ kl

65.4 mm = _____ m2.3 Ds = _____ ms

Kilo hecto deca


second

deci centi milli

3 steps to the right

125 s = _____ ms

125 s = 125000ms

Kilo hecto deca


second

deci centi milli

4 steps to the left

324 dl = _____ kl

324 dl = .0324 kl

Kilo hecto deca


second

deci centi milli

3 steps to the left

65.4 mm = _____ m

65.4 mm = .0654 m

Kilo hecto deca


second

deci centi milli

4 steps to the right

2.3 Ds = _____ ms

2.3 Ds = 23000ms

Summary/Questions

Take 4 minutes to write your summary for today and then questions and

headings on the left side of the notes.

Questions to answer in your summary:1.How are the prefixes setup?

2.How do you convert between units?

Documents

Catalyst