Distributed to students as laboratory equipment, water containers third slip three types (hot and cold water at room temperature) 3 balloons, 3 rubber bands. Thermometer in each one of the lines.
Contribution to experiment with students. As follows: 3 a water rack 3 water (hot and cold water. Water at room temperature), balloons, rubber band ball, 3 3 thoemomitoe 1 group of routes.
distribute materials to do the experiment, the students are as follows: 3. The water container 3 (hot and cold water, room temperature water) balloon rubber band ball 3 3. The line thermometer each group 1.