1, http://www.animfactory.com
2. http://www.bestanimations.com
3. http://www.surfermagazine.com
4. http://stmatthewsschool.com/deep/deep2001/14/index.html

5.http://www.animationlibrary.com/a-l/?n=image.php3&image_id=13238

6.http://www.grc.nasa.gov/WWW/K-12/airplane/aboyle.html

7.http://proton.csudh.edu/lecture_help/boyleslaw.html

8.http://proton.csudh.edu/lecture_help/boyleslaw.html

9.http://www.bestclipart/free/scuba_1.html

We would like to thank Mr. Harlan, Mrs. McCuskey, Mrs. Christian, Mrs. Lorenz, and Nicky Gardner.