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Hot Water in Cold Water

Time Frame

1 class periods of 60 minutes each

Group Size

Small Groups

Authors

Utah LessonPlans

Summary

Students will measure the changes in temperature between hot water placed in cold water to see how moving molecules can transfer energy.


Materials

Attachments

Per group:

  • flask (50 mL)
  • beaker (250 mL)
  • hot water
  • cold water
  • 2 Thermometers
  • foam rubber sleeve for beaker
  • clock or stopwatch
  • worksheet


Instructional Procedures

  1. Ask students what they do when they are cold. What are ways they make the molecule of their bodies increase their speed? Ask how a blanket keeps them warm. If they think the blanket is warm by itself, work to erase this misconception.
  2. Read the question and allow students time to make a prediction.
  3. Show them where the materials are and allow time for the experiment to proceed.
  4. Discuss the results with the students. Make sure they understand that the hot water increases the movement of molecules in the glass that, in turn, increases the speed of molecules in the cold water.


Assessment Plan

Scoring Guide:
Students stay on task during the experiment…………………..4
Students graph reflects the data…………………………………4
Questions are correctly answered………………………………4


Bibliography

Lesson Design by Jordan School District Teachers and Staff.


Created: 10/01/2014
Updated: 02/02/2018
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