Unit 1 Relationships Between Quantities and Expressions

Week 3

Lesson 3 Unit Conversations

Focus Standards• N.Q.1 – Students will use units of measure as a way to understand

problems• N.Q.2 – Define appropriate quantities for the purpose of descriptive

modeling. Given a situation, students will determine, identify and use appropriate quantities for representing the situation.

• N.Q.3 – Choose a level of accuracy appropriate to limitations on measurement when reporting quantities

• A.CED.1 – Create equations in one variable and use them to solve problems. (integer inputs only)

• Objective: Students will apply Dimensional Analysis to a real world context.

Essential Questions

• What do we measure gasoline quantities in?• What would you use to measure the distance

of a drive way? To a store?

Vocabulary Words

Dimensional analysis is a process that uses rates

to convert measurements from one unit to another.

A rate such as in which the two quantities are

equal but use different units, is called a

conversion factor. To convert a rate from one set

of units to another, multiply by a conversion factor.

Read, Write, Draw, Solve• Carlisle is going to fabric supply store to buy

materials for the crafts. She knows that she needs 12 feet of blue yarn and is wondering how much she will spend. Which unit will most likely be used to determine the cost of her yarn?

A. dollar per minuteB. dollar per foot of yarnC. feet of yarn per minuteD. balls of yarn per day

Activator

• Discuss directions for ‘Conserving Fuel’ Task

Summarizer

• Discuss outcomes, struggles and questions students may still have about the ‘Conserving Fuel’ Task