Science Fair Help (Environmental Science)?

The temperature of the exhaust could be compensated for by collecting the exhaust and allowing it to equilibrate to room temperature before exposing the ice cube. Nonetheless, your experiment would likely yield poor results. Car exhaust has a lot of water vapor, and some would condense upon cooling, and some would condense on the ice cube. You would have to process the air samples to remove humidity as a variable. Even then, there are other factors that would make good results difficult to achieve. One of the prime goals in designing scientific experiments is to make the results repeatable, and the number of variables that you would have to control makes that a tough proposition.

Why not investigate the effects of soot on melting ice? That is a real and current area of speculation with regards to the North Polar Ice Cap.

Try this:

Construct a clear plastic box to enclose two white poly funnels 6-inches in diameter discharging into separate 100ml graduated cylinders. The top of the box is a glass pane, which does not block infrared energy, and above the glass located exactly between the two funnels is a heat lamp.

You make a circular plastic mold 5-inches in diameter and half an inch thick that can be filled with a measured amount of water and frozen. A number of disks can be made ahead of time. For the experiment, you place two disks in a pan, shake a measured amount of pepper onto one disk, then place the two disks in the funnel, close the box, and turn on the heat lamp.

Every five minutes, you record the amount of water in the graduated cylinders. You do ten runs, alternating the side with the pepper, compute mean and standard deviation for each 5-minute interval, then graph the results. When it comes time to display, you can show your data and graph, and have melting ice showing an experiment in progress.

You'll have to do some experimenting ahead of time to determine how much pepper to use, what distance to use for the heat lamp, etc. You might have to provide some sort of support for the ice discs in the funnels, so that they drain easily. The funnels should have a support that keeps them above the cylinders, and locates them in the same position for each run. Air needs to circulate freely inside the box, so both samples have the same conditions.

your lacking the better portion of the technological understanding project!!! to think of out ur very own project!! attempt questioning approximately worldwide warming initiatives and another previous technological understanding experiments/ initiatives which you have have been given performed!! :)