Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Linear Functions

9-12

60 Minutes

• ##### Device
• TI-73 Explorer™
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

CBL™/CBL 2™
Sensor - Temperature
TI Connectivity Cable
Vernier LabPro®

• ##### Other Materials
This is Activity 7 from the EXPLORATIONS Book: Real-World Math Made Easy.

The following materials are required for this activity :
• Styrofoam cups or coffee mugs
• Hot and cold water

## Mix It Up: Mixing Liquids of Different Temperatures

#### Activity Overview

In this activity, students' will use temperature sensors to measure temperatures of water samples before and after mixing. They compare the mixing temperatures to a linear prediction.

#### Before the Activity

• Connect temperature probes to Channel 1 and Channel 2 on the CBL 2™ or Vernier LabPro®
• Connect the CBL 2 or LabPro to the calculator using the Unit-to-Unit cable
• See the attached PDF file for detailed instructions for this activity
• Print pages 61 - 67 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

• Fill Cup 1 with 100 ml cold water and Cup 2 with 150 ml hot water
• Place the CH1 probe in Cup 1 and the CH2 probe in Cup 2, and record the temperature readings in the Data Table
• Pour the contents of Cup 1 into Cup 2 and record the final temperature of Cup 2 in the Data table
• Repeat the experiment with equal volumes of hot and cold water
• Understand how to predict mixture temperature and verify the prediction
• #### After the Activity

Students' will complete the Student Data Collection and Analysis Sheet and answer the questions listed on it.

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary