In this experiment, you will first use a computer to find the normal melting temperature of ice. Then by adding salt to melting ice, you will see the effect of salt on the melting temperature of ice. You will next make and test a plan for reaching the coldest temperature using water, ice, and salt. Finally, you will have a contest to see which group can make their mixture reach the lowest temperature.
In this experiment, you will
Find the normal melting temperature of ice.
See the effect of adding salt on ice's melting temperature.
Plan and test an experiment to find the salt and ice combination that will make the coldest temperature.
Compete with other groups trying to reach the coldest temperature.
Apply the results of the experiment.
Sensors and Equipment
This experiment requires each of the following Vernier sensors and equipment (unless otherwise noted):
Step-by-step instructions for computer-based data collection
List of materials and equipment
Note: The experiment preview of the computer edition does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.