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How effective are automobile sunshadesFeatured science projectScience project video

Conclusion

The hypothesis that  cars with  reflective bubble sunshades  have the lowest interior temperature   is proven to be true.

The use of sunshades inside a car on bright sunny days hels to reduce temperatures by about 8 to 10 °C. They certainly make quite a difference! Besides helping to keep the cabin at comfortable temperatures, they also help to protect our car’s interior from discoloration and cracking.

Also consider

What would happen if the experiment were to be repeated by using cars with tinted glass?

The experiment can also be repeated by using cars with different colors and sunshades.

References

Is your car an oven? - http://www.roadandtravel.com/autonewsandviews/2005/sunshades.htm

Cool your wheels - http://editorial.autos.msn.com/article.aspx?cp-documentid=434615

What should I consider when buying car shades? - http://www.wisegeek.com/what-should-i-consider-when-buying-car-shades.htm

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Complexity level:
4
Project cost ($):
90
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.