1.)Hold up a ball of clay. Ask the students to describe the various ways the matter can be described. Display the property words (index cards) on the board. Challenge the students to brainstorm ways in which the properties of the ball of clay can be changed. On the board, denote the suggested properties. Explain to the students that there are two types of changes that matter can undergo: physical or chemical. Lead them to conclude that only physical changes were described.
2.)Students view and discuss teacher prepared PowerPoint presentation, slides 1-7.
3.)Distribute the following materials to each pair of students: 2 observation sheets, 2 clear plastic cups (labeled), 2 plastic teaspoons, 1 magnifying lens, vinegar, baking soda, and sugar.
4.)Students will perform the experiments as outlined on the observation sheet. In addition, students will provide a written explanation as to whether a physical or chemical change has occurred.
5.)The students' findings and explanations are discussed. Lead students to conclude that the vinegar and sugar combination was merely a physical change, but the vinegar and baking soda caused a chemical change.
6.)Allow the students to participate in “Name That Change!” challenge (PowerPoint slides 8-end)
7.)Administer the “Name That Change!” assessment (see attachment).