Year 2 and year 3 students explored how greenhouse gases affect the Earth’s atmosphere and then together with their teachers carried out a fair test to prove ‘the greenhouse’ function of CO2. They poured 2 cm. of vinegar into two jars, put two thermometers into each jar, closed the jars with the lids and placed them under a lamp for 10 minutes. Afterwards they recorded the temperatures, added half teaspoon of sodium bicarbonate and watched the reaction and temperature changes. The students were surprised to find out that the heat was relesead by reaction. They discussed the outcomes with their teachers.