Vernier Software and Technology
Vernier Software & Technology

A Good Cold Pack

Figure from experiment 16 from Middle School Science with Vernier


Cold packs are used to treat sprained ankles and similar injuries. A cold pack is typically made of a thin plastic inner bag containing water. That bag, in turn, is surrounded by a heavier plastic bag containing a solid substance. When the pack is twisted, the inner bag breaks and releases the water. As the solid substance dissolves in the water, energy is absorbed and the resulting mixture gets colder.

In this experiment, you will first determine temperature changes as several different solid substances dissolve in water. You will then develop and test a plan for making the best cold pack using 3.0 grams of one of the substances and the best amount of water.


In this experiment, you will

  • Use a Temperature Probe to measure temperature.
  • Determine temperature changes as solid substances dissolve in water.
  • Design and test a plan for making the best cold pack.
  • Report your results.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Standards Correlations

See all standards correlations for Middle School Science with Vernier »

Middle School Science with Vernier

See other experiments from the lab book.

1A Hot Hand
2Heating of Land and Water
3The Greenhouse Effect
4Relative Humidity
5Soil Study
6Absorption of Radiant Energy
7Reflectivity of Light
8Schoolyard Study
9A Good Sock
10What Causes the Seasons?
11Solar Homes
12Ocean Floor Mapping
13Boiling Temperature of Water
14Freezing and Melting of Water
15How Low Can You Go?
15BZiplock Ice Cream
16A Good Cold Pack
17Lemon "Juice"
18Get a Grip!
19Fun with Pressure
20Water Hardness Study
21Diffusion: How Fast?
22A Water Field Study
23Cooling Rates: Shaq vs. Susie
24Yeast Beasts in Action
25Heart Rate and Body Position
26Heart Rate and Exercise
27Mapping a Magnetic Field
29Frictional Forces
30First-Class Levers
33Graphing Your Motion
34Speeding Up
35The Indy 100
35BPencil Car
36Crash Dummies
37Falling Objects
38A Speedy Slide

Experiment 16 from Middle School Science with Vernier Lab Book

<em>Middle School Science with Vernier</em> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

Buy the Book

Dev Reference: VST0221

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