Lesson 3 Materials

Per Class

• 2-4 electric kettles

• Water

• 1 16-oz single-wall cup with lid

• 2 thermometers

• 500-mL beaker

• Cups from Lesson 2

• Testing Cup System Features data chart

• Hot Water Test data chart

• Chart paper

• Markers 

Per Group

• Labeled cup from Testing Cup System Features lab in Lesson 2

• 500-mL beaker

• 1 thermometer

• 1 timer or stopwatch

Per Student

• 1 safety goggle

• Science notebook

  • Progress Tracker

  • Hot Water Test

  • Cup Lid Lab

  • Colored pencils 

Prep

Review

• Lesson Plan

• Slides

• Assessment or answer keys (if required)

Prepare

• Teacher Reference materials

• Handouts (printed or digital)

• Modify the data table from Lesson 2. Add 1 column to the far right for temperature change with hot water (there is no need to replicate the full data table.) Display the table where students can see it and record their new data from this lesson’s lab. 

• Cups from the Testing Cup System Features lab in Lesson 2 should be ordered from best-performing to worst-performing for keeping a liquid cold at the start of the lesson. 

• Students will build an understanding of “variable” in this lesson, and it will be added to the Word Wall. Independent variable, dependent variable, and control variable are encountered as well, but these will not be added to the Word Wall until the next lesson.

Hot Water Test Lab

• Fill electric kettles ¾ of the way, heat the water. When ready for the lab, turn off the kettles, and fill them up with cool sink water (must do to prevent burns). 

• Every group will need 400 mL of water (roughly 200 mL for each of their 2 cups). 

• For each group of students, prepare a bin of these lab materials: 500-mL beaker, the group’s labeled cup from Testing Cup System Features lab in Lesson 2, 1 thermometer, 1 stopwatch or timer, 1 pair of safety goggles per student.

Notes during the lab

• Turn on electric kettles about 15 minutes before you need the water to be ready for the lab.