Carbon dioxide (CO2) and global warming
The results show that the first tank with the normal air cools down the quickest and the third tank, with the air from the car exhaust, cools down the slowest.
Use the graph below to plot the results of above observation.
Be wary of carbon monoxide poisoning from the exhaust of the car. Conduct the experiment in a well ventilated garage. Adult assistance is required for the operation of the car.