HW Due YouTube Video Tonight’s HW

Metric HW handout #1 (will receive at end of class) and watch a Dimensional Analysis Video of your choice. Finish today’s Dim. Analysis problems #1-10 if necessary

Do Now

September 17 & 18

Take a CLICKER and theMetric System PRE Assessment from my desk Ensure you are completing the side that says PRE!!! (NOT ‘Post’)

On a scale of 1-5 (1 being the least, 5 being the most) how CONFIDENT are you with #1

1 2 3 4 5

0% 0% 0%0%0%

1. No clue what’s going on2. Kinda got it, but then you

lost me3. Ehh…I’m ok4. I think I got it, but I’d like

more practice5. So confident I could teach

it to someone right now

On a scale of 1-5 (1 being the least, 5 being the most) how CONFIDENT are you with #2

1 2 3 4 5

0% 0% 0%0%0%

1. No clue what’s going on2. Kinda got it, but then you

lost me3. Ehh…I’m ok4. I think I got it, but I’d like

more practice5. So confident I could teach

it to someone right now

In which problem was the math easier?

1 2 3 4

0% 0%0%0%

1. #12. #23. Equal! Both 1 & 24. I really had NO IDEA what

was going on at all in

Bill Nye

• What did you learn? Anything interesting?• Did you find the error?• Anything confusing?• Any comments?

Metric Patrol

• NO ALCOHOL OR PRESCRIPTION MEDICATIONS (Tylenol, Advil, etc is ok)

1030

200Questions so far?

12 1.2

We will complete the first 2 together

2237 3.756 5.667 6.775 7.5

2.2

Questions so far?

Now you try!

Do Not lose this paper! You will need to reference it all year!

Lesson 1: Length

T. Trimpe 2008 http://sciencespot.net/

English vs. Metric Units

Left Image: http://webapps.lsa.umich.edu/physics/demolab/controls/imagedemosm.aspx?picid=1167Right Image: http://share.lancealan.com/N800%20ruler.jpg

Which is longer?

A. 1 mile or 1 kilometer

B. 1 yard or 1 meter

C. 1 inch or 1 centimeter

1.6 kilometers

1 mile

1 yard = 0.9144 meters

1 inch = 2.54 centimeters

Metric UnitsThe basic unit of length in the metric system is the meter and is represented by a lowercase m.

Standard: The distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second.Complete each statement with Metric Units

1 Kilometer (km) = 1000 meters (m)

1 Meter = 100 Centimeters (cm)

1 Meter = 1000 Millimeters (mm)

Which is larger?

A. 1 meter or 105 centimeters

B. 4 kilometers or 4400 meters

C. 12 centimeters or 102 millimeters

D. 1200 millimeters or 1 meter

Measuring Length

12 or 13 mm1.2 or 1.3 cm136 or 137 mm13.6 or 13.7 cm

We are about to learnDIMENSIONAL

ANALYSIS.It’s a little different…But after some practice, it’s easy (And you’ll need to know this in Chem and Bio)

Dimensional Analysis

1030 cm = ______ m?

How does the math work?

1030 cm . __1_m 1 100 cm

Multiply by a ratio of 1 (just like ratios or fractions)

What CANCELS?What REMAINS?1030 m

100

SIMPLIFY & Solve …don’t forget the unit!

10.30 m OR10.3 m

Use Metric Magic and Dimensional Analysis to complete the following problems. Need help? Ask a friend or ask a teacher. SHOW ALL WORK, round to at least 2 decimal places!

40.64 156.492 1.9768

279.63 40.56 131.232

15.14 354.9 110.23

FIX # 5, 7, 8!!!! (They use ‘l’ instead of ‘L’

ALSO – depending how you round, your answers might vary slightly!!!

10. CHALLENGE! _____________________________mm = 1 mile1,609,000

Do you prefer…

1 2 3

0% 0%0%

1. Dimensional Analysis (I’m a numbers person!

2. Ladder Method (way easier)

3. Either – I can see the benefits of both methods

On a scale of 1-5 (1 being the least, 5 being the most) how CONFIDENT are you with the LADDER METHOD

1 2 3 4 5

0% 0% 0%0%0%

1. No clue what’s going on2. Kinda got it, but then you

lost me3. Ehh…I’m ok4. I think I got it, but I’d like

more practice5. So confident I could teach

it to someone right now

On a scale of 1-5 (1 being the least, 5 being the most) how CONFIDENT are you with DIMENSIONAL ANALYSIS

1 2 3 4 5

0% 0% 0%0%0%

1. No clue what’s going on2. Kinda got it, but then you

lost me3. Ehh…I’m ok4. I think I got it, but I’d like

more practice5. So confident I could teach

it to someone right now

Need some help with dimensional analysis?

Try this YouTube video: http://www.youtube.com/watch?v=XKCZn5MLKvk

Or these two videos from Khan Academy http://www.youtube.com/watch?v=SYkmadc2wOIhttp://www.youtube.com/watch?v=w0nqd_HXHPQ

Or this website for some detailed explanations and solved examples:http://www.alysion.org/dimensional/fun.htm

EXIT SLIP• Complete the Post Assessment

(on the BACK of your PRE assessment) Use either LADDER METHOD or

DIMENSIONAL ANALYSIS!• Turn in at the in box• This is not for a grade, but we will return to this

next class

• Take a copy of your HWThis is not for a grade, but we will REVIEW this next class

On a scale of 1-5 (1 being the least, 5 being the most) how CONFIDENT are you with #1

1 2 3 4 5

0% 0% 0%0%0%

1. No clue what’s going on2. Kinda got it, but then you

lost me3. Ehh…I’m ok4. I think I got it, but I’d like

more practice5. So confident I could teach

it to someone right now

On a scale of 1-5 (1 being the least, 5 being the most) how CONFIDENT are you with #2

1 2 3 4 5

0% 0% 0%0%0%

1. No clue what’s going on2. Kinda got it, but then you

lost me3. Ehh…I’m ok4. I think I got it, but I’d like

more practice5. So confident I could teach

it to someone right now

In which problem was the math easier?

1 2 3 4

0% 0%0%0%

1. #12. #23. Equal! Both 1 & 24. I really had NO IDEA what

was going on at all in

Please return your clickers!