Catalyst

Catalyst1. How do I feel about my benchmark scores?2. What could I have done to improve them?3. Is there anything Mr. Astor can do to help me?4. Complete the survey on Mr. Astors pageEnd

Lecture 3.3 Dimensional analysis through Mr. Astors Travels

World Traveler

Mr. Astor: World Traveler

Dollars to Rand

1$= 7.05 RAND

Todays Learning TargetsLT 3.3 I can discuss how to convert between two related units and explain how to complete a multi step conversion problem involving unrelated units.

How do we convert between units?

I. Conversion FactorsTo convert between two different units we use a conversion factor. A conversion factor allows you to convert between units.

I. Conversion FactorsUnits You WantUnits You HaveNumber that you haveNumber with New UnitsIf it helps, set up train tracks before you start!

Conversion Factors Example Convert $15 to cents100Cents1 Dollars15 Dollars1500

Table TalkConvert 250 cm to inches (Note 1 in = 2.54 cm)

II. Multi-Step ConversionsOften times, we need to take multiple steps to convert between units.We must set up a series of conversion factors so that all unnecessary units cancel one

Convert 3 hours to seconds1 hour3 hours10,800 sec60 min1 min60 sec

Table TalkHow many days are there in 525,000 seconds? (Note 1 day = 24 h, 1 h = 60 min, and 1 min = 60 s)

White Board Races

Question 1Convert 500 minutes into seconds

Question 2You have 5 dozen doughnuts, how many doughnuts do you have (12 doughnuts = 1 dozen)

Question 3You have 14 cups of water, how many gallons of water do you have (1 gallon = 4 quarts; 1 quart = 4 cups)

Question 4You have 32 cups of solution. How many gallons do you have? (1 gallon = 4 quarts; 1 quart = 4 cups)

Question 5How many minutes are there in 1 year?

Balancing Equations QuizWhen you are finished with dimensional analysis, spend about 20 minutes to complete the quiz. We will grade it as a class next week.

Mr. Astor World Traveler StationsPlease follow the instructions on the handout and travel to each station accordingly.

USA South Africa ZambiaFinish the Journey to at least Zambia before the end of the period.

Want to Travel the World?If the whole class finishes the required stations, Mr. Astor will show you the rest of the pictures.

a

MY STUDY ABROAD SCHOOL: UCT (University of Cape Town)

Animals are everywhere!

Animals are everywhere!

Animals are everywhere!

Safety First!

Traveling the World is Beautiful!

Exit SlipYou have 42 dollars. You know the following conversions: 1 pound = $1.62 1 pound = 1.25 EuroHow many Euros do you have?

Closing TimeHomework 3.3 Conversion Factors