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The materials required for this science fair project:
- 3 cars – of thesame make and model, interior and color
- 1 reflective bubble sunshade
- 1 reflective foam sunshade
- 1 infrared thermometer


1. For this science project, the independent variable is the type of sunshade used – no sunshade, a reflective bubble sunshade and a reflective foam sunshade. The dependent variable is the temperature on the dashboard. This is determined by using an  infrared thermometer. The constants (control variables) are the color of the car, the outside temperature, the make and model of the car.

2. The 3 cars are first inspected to ensure that the car’s model, interior color, body paint color, seat cushion and steering wheels are all identical.

3. The 3 cars are then parked  directly under the sun. They should not be parked under a shade or in a place where the shadow of a tree or building may be cast over the cars. The temperatures on the cars’ dashboards are checked using the infrared thermometer every 2 hours between 8:00 am  and  6:00 pm to ensure they are identical.

4. On the second day of the experiment, the first doesn’t get a sunshade. The second car will be fitted with a reflective bubble shade while the third car will be fitted with a reflective foam shade. The sunshades should be  cover the entire front windscreens of the cars.

5. The three cars are parked under the sun once gain as described in procedure 2. The temperatures on the dashboards are checked once more every 2 hours between 8:00 am and 6:00 pm. The  temperatures are recorded in the table below.

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 1 day for the science project experiment
Material availability:
Easily found
Safety concerns:

Ensure that cars are driven by persons with valid driving licenses.