Students can create a graph of the data to display the results. Ask students to develop hypotheses to explain why salt had this effect on ice. Activity B - Super Cool 1. Label the beakers A and B. 2. Place an unfrozen freeze pop in each of the beakers so that it is surrounded by ice.
Freeze pops are popcicles with a plastic wrap, and can be purchased in most grocery stores.
Place a thermometer in each beaker and record the temperature of the ice. Mix one cup of rock salt with the ice in Beaker A. 5. Record the temperatures in each of the beakers every five minutes. Continue taking temperature readings for 30 minutes. Examine the freeze pops at the end of the experiment, and determine which one has frozen and its degree of hardness.