Now stop heating. Close the mouth of the flask with a rubber cork fitted with a thermometer. When water stops boiling invert the flask cover it with a wet cloth. The teacher can ask the students to rephrase the question if it is constructed in an incorrect manner Try to provide free intellectual environment by not evaluating student theories. Encourage interaction among students.
Teacher encourages students to ask as many questions as possible.
When adequate questions have been asked the teacher can ask the students to explain the puzzling situation. Teacher can aid the thinking procedure by revising the steps of inquiry. This activity can be planned in three stages. Teacher prepares the students and settles them in the laboratory. They perform the experiment.