September 17 & 18

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# September 17 & 18 - PowerPoint PPT Presentation

September 17 & 18. Take a CLICKER and the Metric 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. No clue what’s going on

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September 17 & 18

Take a CLICKER and the

Metric 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
• No clue what’s going on
• Kinda got it, but then you lost me
• Ehh…I’m ok
• I think I got it, but I’d like more practice
• 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
• No clue what’s going on
• Kinda got it, but then you lost me
• Ehh…I’m ok
• I think I got it, but I’d like more practice
• So confident I could teach it to someone right now
In which problem was the math easier?
• #1
• #2
• Equal! Both 1 & 2
• 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?
Metric Patrol
• NO ALCOHOL OR PRESCRIPTION MEDICATIONS (Tylenol, Advil, etc is ok)
10

30

200

Questions so far?

We will complete the first 2 together

12

1.2

22

2.2

3.7

Now you try!

37

56

5.6

67

6.7

75

7.5

Questions so far?

Lesson 1: Length

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

1 mile

1.6 kilometers

1 yard = 0.9144 meters

1 inch = 2.54 centimeters

English vs. Metric Units

Which is longer?

A. 1 mile or 1 kilometer

B. 1 yard or 1 meter

C. 1 inch or 1 centimeter

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

A. 1 meter or 105 centimeters

B. 4 kilometers or 4400 meters

C. 12 centimeters or 102 millimeters

D. 1200 millimeters or 1 meter

km

Metric Units

m

cm

mm

The basic unit of length in the metric systemisthe meterand 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) = 1000meters (m)
• 1 Meter = 100Centimeters (cm)
• 1 Meter = 1000 Millimeters (mm)

Which is larger?

Just like saying What's Larger? 100 cm or 105 cm

Just like saying What's Larger? 4000 m or 4400 m

Just like saying What's Larger?

120 mm or 102 mm

Just like saying What's Larger? 1200 mm or 1000 mm

Measuring Length

12 or 13 mm

1.2 or 1.3 cm

136 or 137 mm

13.6 or 13.7 cm

DIMENSIONAL

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

How does the math work?

1030 cm = ______ m?

Multiply by aratio of 1

(just like ratios or fractions)

1030 cm .__1_m

1 100 cm

What CANCELS?

1030 m

100

What REMAINS?

SIMPLIFY & Solve 

…don’t forget the unit!

10.30 m

OR

10.3 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!

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

1.9768

40.64

156.492

40.56

131.232

279.63

15.14

354.9

110.23

1,609,000

10. CHALLENGE! _____________________________mm = 1 mile

Do you prefer…
• Dimensional Analysis (I’m a numbers person!
• 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
• No clue what’s going on
• Kinda got it, but then you lost me
• Ehh…I’m ok
• I think I got it, but I’d like more practice
• 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
• No clue what’s going on
• Kinda got it, but then you lost me
• Ehh…I’m ok
• I think I got it, but I’d like more practice
• So confident I could teach it to someone right now
Need some help with dimensional analysis?

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
• Take a copy of your HW

This 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
• No clue what’s going on
• Kinda got it, but then you lost me
• Ehh…I’m ok
• I think I got it, but I’d like more practice
• 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
• No clue what’s going on
• Kinda got it, but then you lost me
• Ehh…I’m ok
• I think I got it, but I’d like more practice
• So confident I could teach it to someone right now
In which problem was the math easier?
• #1
• #2
• Equal! Both 1 & 2
• I really had NO IDEA what was going on at all in