Catalyst 1 Set up your Cornell notes by

Catalyst 1. 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

Objectives SWBAT: • 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 Units get smaller Base Units Kilo hecto deca (h) (D) (k) meter gram Liter second deci (d) Units get larger centi (c) milli (m)

Metric System Basics • The three prefixes that we will use the most are: – kilo – centi – milli Base Units Kilo hecto deca (h) (D) (k) meter gram Liter 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

Metric System Converting • 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 Base Units Kilo hecto deca meter gram Liter 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 millimeters Example not to scale 40 41 1 mm 1 mm 40 1 mm 41 1 cm

Metric System Converting • 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 Base Units Kilo hecto deca meter gram Liter second deci centi 1. 00 meter = 100. centimeters milli

Metric System Converting • 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 meter liter gram second deci centi milli

Metric System Converting • 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

Metric System Converting – How many steps are there from meters to kilometers? Base Units Kilo hecto deca meter gram Liter second 3 steps! deci centi milli

Metric System Converting – In which direction are we moving? Base Units Kilo hecto deca meter gram Liter second deci To the left centi milli

Metric System Converting 16093 meters = _____km – We are moving 3 steps to the left 16093 m Where is the decimal to start with?

Metric System Converting 16093 meters = _____km – We are moving 3 steps to the left 16093. Where is the decimal to start with?

Metric System Converting 16093 meters = _____km – We are moving 3 steps to the left 16093.

Metric System Converting 16093 meters = _____km – We are moving 3 steps to the left 16. 093

Metric System Converting 16093 m = 16. 093 km

Metric System Converting • Now let’s start from centigrams and convert to kilograms 400000 centigrams = ____ kilograms Base Units Kilo hecto deca meter gram Liter second deci centi milli

Metric System Converting – How many steps are there from centigrams to kilograms? Base Units Kilo hecto deca meter gram Liter second 5 steps! deci centi milli

Metric System Converting – In which direction are we moving? Base Units Kilo hecto deca meter gram Liter second deci To the left centi milli

Metric System Converting 400000 cg = ____ kg – We are moving 5 steps to the left 400000 Where is the decimal to start with?

Metric System Converting 400000 cg = ____ kg – We are moving 5 steps to the left 400000. Where is the decimal to start with?

Metric System Converting 400000 cg = ____ kg – We are moving 5 steps to the left 400000.

Metric System Converting 400000 cg = ____ kg – We are moving 5 steps to the left 4. 00000

Metric System Converting 400000 cg = 4. 00000 kg OR 400000 cg = 4 kg

Metric System Converting • Now let’s start from meters and convert to centimeters 5 m = ____cm Base Units Kilo hecto deca meter gram Liter second deci centi milli

Metric System Converting • How many steps and in which direction are we moving? m cm Base Units Kilo hecto deca meter gram Liter second deci 2 steps to the right! centi milli

Metric System Converting Base Units Kilo hecto deca meter gram Liter second deci centi milli 2 steps to the right! 5. What do we do now?

Metric System Converting Base Units Kilo hecto deca meter gram Liter second deci centi milli 2 steps to the right! 5. We add zeros when there is an empty space

Metric System Converting Base Units Kilo hecto deca meter gram Liter second deci centi milli 2 steps to the right! 5. 00 We add zeros when there is an empty space

Metric System Converting Base Units Kilo hecto deca meter gram Liter second deci centi 2 steps to the right! 500. milli

Metric System Converting 5 m = 500. cm OR 5 m = 500 cm

NOW YOU TRY In your notebook complete the following problems: 125 s = _____ ms 324 dl = _____ kl 65. 4 mm = _____ m 2. 3 Ds = _____ ms

Base Units Kilo hecto deca meter gram Liter second deci centi 3 steps to the right 125 s = _____ ms 125 s = 125000 ms milli

Base Units Kilo hecto deca meter gram Liter second deci centi 4 steps to the left 324 dl = _____ kl 324 dl =. 0324 kl milli

Base Units Kilo hecto deca meter gram Liter second deci centi 3 steps to the left 65. 4 mm = _____ m 65. 4 mm =. 0654 m milli

Base Units Kilo hecto deca meter gram Liter second deci centi 4 steps to the right 2. 3 Ds = _____ ms 2. 3 Ds = 23000 ms milli

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?