Pass out student data sheets and crayons. Tell the children to predict whether each item on the data sheet will sink or float. Have them color in the appropriate box. Two groups work with the salt water solution and two groups work with the alcohol solution. In small groups students are to test their predictions and record the results on the group data sheet.
Students switch to work with the other liquid.
Predict and test objects. Discuss the results. Key Questions 1. Extension Activities 1. Predict and test other object in salt water or alcohol solution to determine if they ll sink or float.