This is a one day activity using water and a sugar cube to have students observe physical properties and changes in matter. The investigation guides them through steps of observation, then they must write about what they observed and what they think happened. Use this as an assessment of science thinking or a descriptive writing activity.
National Science Framework :By the end of grade 5. When two or more different substances are mixed, a new substance with different properties may be formed; such occurrences depend on the substances and the temperature. No matter what reaction or change in properties occurs, the total weight of the substances does not change