Activity 1.1.2 Student Worksheet . Review appropriate safety measures and procedures. Organize research teams and complete lab. At completion of hands-on Activity, compare results and conclusions. This is very similar to what happens to water.
Heat is added to melt ice, and heat is given off when water solidifies back into ice.
The reaction takes place below our body temperature so we cannot feel it. Thus, they can live under pack ice where salt water is below the freezing temperature of fresh water, but only so long as no ice enters their body. Have students freeze an apple at home and bring it to class to thaw. Place it next to an apple that has not been frozen, and observe it over the next 2-3 days. Students can respond in their Logbooks or turn in their written explanation at the end of the class.