The teacher asks a question from an activity that the students to test their understanding and allow students to compare the relationships of the microscopic level to the notice in the macroscopic level.
Teachers and students asked questions of the leaves. To test the students understand and compare the relationship of the notice in the microscopic level to the macroscopic.
The teacher asked a question from the activities to students. To test and compare the relationship of understanding students noticed in microscopic level with level macroscopic.