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skills, and understand the nature of scientific inquiry from the Pamela M. Clevenger, Hinds Community College, for her cre-
perspective of hands-on experiences. The instructor’s edition of ativity in revising the multimedia PowerPoint lecture outlines.
the laboratory manual can be found on the Physical Science com-
Last, I wish to acknowledge the very special contributions of my
panion website.
wife, Patricia Northrop Tillery, whose assistance and support
throughout the revision were invaluable.
ACKNOWLEDGMENTS
MEET THE AUTHOR
We are indebted to the reviewers of the ninth edition for their con-
structive suggestions, new ideas, and invaluable advice. Special
thanks and appreciation goes out to the ninth- edition reviewers: BILL W. TILLERY
Bill W. Tillery is professor emeritus of Physics at Arizona
Jason Barbour, Anne Arundel Community College
State University, where he was a member of the faculty from
James W. Barr, Freed-Hardeman University
1973 to 2006. He earned a bachelor’s degree at Northeastern
James Baxter, Harrisburg Area Community College
State University (1960) and master’s and doctorate degrees
Amy Biles, Mississippi Delta Community College, Moorhead
from the University of Northern Colorado (1967). Before
Claude Bolze, Tulsa Community College
moving to Arizona State University, he served as director of
Terry Bradfield, Northeastern State University
the Science and Mathematics Teaching Center at the Univer-
Ngee-Sing Chong, Middle Tennessee State University
sity of Wyoming (1969–1973) and as an assistant professor at
Ana Ciereszko, Miami Dade College
Florida State University (1967–1969). Bill served on numer-
Edgar Corpuz, University of Texas-Pan American
ous councils, boards, and committees, and he was honored as
George T. Davis, Jr., Mississippi Delta Community College,
the “Outstanding University Educator” at the University of
Moorhead
Wyoming in 1972. He was elected the “Outstanding Teacher”
Paul J. Dolan, Jr., Northeastern Illinois University
in the Department of Physics and Astronomy at Arizona State
Thomas Dooling, The University of North Carolina, Pembroke
University in 1995.
Carl Drake, Jackson State University
During his time at Arizona State, Bill taught a variety of
J. Dennis Hawk, Navarro College
courses, including general education courses in science and so-
Stephen Herr, Oral Roberts University
ciety, physical science, and introduction to physics. He received
Mahmoud Khalili, Northeastern Illinois University
more than forty grants from the National Science Foun dation,
Betty Owen, Northeast Mississippi Community College
the U.S. Office of Education, private industry (Arizona Public
Pamela Ray, Chattahoochee Valley Community College
Service), and private foundations (The Flinn Foundation) for
Walid Shihabi, Tulsa Community College Southeast Campus
science curriculum development and science teacher in-service
Brian Utter, James Madison University
training. In addition to teaching and grant work, Bill authored
Joshua Winter, Mississippi State University
or coauthored more than sixty textbooks and many mono-
We would also like to thank the following contributors: graphs and served as editor of three separate newsletters and
journals between 1977 and 1996.
James Baxter, Harrisburg Area Community College, and Ngee-
Bill has attempted to present an interesting, helpful program
Sing Chong, Middle Tennessee State University, for their un-
that will be useful to both students and instructors. Comments
derstanding of student challenges in grasping problem-solving
and suggestions about how to do a better job of reaching this goal
skills in authoring Examples and Parallel Exercises for the earth
are welcome. Any comments about the text or other parts of the
science and astronomy chapters.
program should be addressed to:
J. Dennis Hawk, Navarro College, for his knowledge of student
conceptual understandings, used in developing the personal re- Bill W. Tillery
sponse system questions. e-mail: bill.tillery@asu.edu

xx PREFACE