Students will use a clock to time rates of melting. Show students the different materials and ask them how they could use these materials to make an ice cube melt quickly. Divide students into groups of four. Each group will develop and write out an experiment. Teacher approves plan.
Students record their melting time and discuss results.
Melt other objects using the same or different materials. For example, children could develop an experiment to melt chocolate and predict its melting time. Students will turn in the experiment plan and results. Allow students to observe as teacher demonstrates investigation. Ask the students what will happen if the bag was put into a mixture of ice and water.