Stephanie Paris
Consultants
Timothy Rasinski, Ph.D.
Kent State University
Lori Oczkus
Literacy Consultant
Katie McKissick
Physical Science Consultant
Based on writing from
TIME For Kids. TIME For Kids and the TIME
For Kids logo are registered trademarks of
TIME Inc. Used under license.
Publishing Credits
Dona Herweck Rice , Editor-in-Chief
Lee Aucoin , Creative Director
Jamey Acosta , Senior Editor
Heidi Fiedler , Editor
Lexa Hoang , Designer
Stephanie Reid , Photo Editor
Emily Engle , Contributing Author
Rachelle Cracchiolo , M.S.Ed., Publisher
Image Credits: pp.11 (top, bottom),
15 (top), 30, 34, 42, 5253, 55 (all) Alamy;
pp.10, 35 (right), 57 (bottom), 4445
iStockphoto; p.53 (top & middle) Toru
Yamanaka/AFP/Getty Images/Newscom;
pp.44, 47 NASA; pp.9, 13, 2223, 2829,
3637, 3839 (bottom), 4849 (illustrations)
Timothy J. Bradley; pp.4849 (top) Andrejs
Pidjass/NejroN/Getty Images/iStockphoto;
p.50 Paul Lampard/Getty Images/
iStockphoto; p.52 (bottom) Gary Hincks/
Photo Researchers, Inc.; All other images
from Shutterstock.
A World Without Friction! .........
Types of Friction ................
What Affects Friction? ...........
What Does Friction Do? .........
Dont Hold Back! ...............
Glossary ......................
Index ........................
Bibliography ..................
More to Explore ................
About the Author ...............
Teacher Created Materials
5301 Oceanus Drive
Huntington Beach, CA 92649-1030
http://www.tcmpub.com
ISBN 978-1-4333-4940-9
2013 Teacher Created Materials, Inc.
ISBN-13: 978-1-68444-719-0 (e-book)
Synched Read-Along Version by:
Triangle Interactive LLC
PO Box 573
Prior Lake, MN 55372
Consultants
Timothy Rasinski, Ph.D.
Kent State University
Lori Oczkus
Literacy Consultant
Katie McKissick
Physical Science Consultant
Based on writing from
TIME For Kids. TIME For Kids and the TIME
For Kids logo are registered trademarks of
TIME Inc. Used under license.
Publishing Credits
Dona Herweck Rice , Editor-in-Chief
Lee Aucoin , Creative Director
Jamey Acosta , Senior Editor
Heidi Fiedler , Editor
Lexa Hoang , Designer
Stephanie Reid , Photo Editor
Emily Engle , Contributing Author
Rachelle Cracchiolo , M.S.Ed., Publisher
Image Credits: pp.11 (top, bottom),
15 (top), 30, 34, 42, 5253, 55 (all) Alamy;
pp.10, 35 (right), 57 (bottom), 4445
iStockphoto; p.53 (top & middle) Toru
Yamanaka/AFP/Getty Images/Newscom;
pp.44, 47 NASA; pp.9, 13, 2223, 2829,
3637, 3839 (bottom), 4849 (illustrations)
Timothy J. Bradley; pp.4849 (top) Andrejs
Pidjass/NejroN/Getty Images/iStockphoto;
p.50 Paul Lampard/Getty Images/
iStockphoto; p.52 (bottom) Gary Hincks/
Photo Researchers, Inc.; All other images
from Shutterstock.
A World Without Friction! .........
Types of Friction ................
What Affects Friction? ...........
What Does Friction Do? .........
Dont Hold Back! ...............
Glossary ......................
Index ........................
Bibliography ..................
More to Explore ................
About the Author ...............
Teacher Created Materials
5301 Oceanus Drive
Huntington Beach, CA 92649-1030
http://www.tcmpub.com
ISBN 978-1-4333-4940-9
2013 Teacher Created Materials, Inc.
W
hat is friction?
W
here do you encounter
friction?
How can w
e increase or
decrease friction?
I magine
sitting on a couch at
home. You decide to stand up,
but when you try to push off the
ground, your feet slip out from
under you. Everything is as slippery
as ice. Luckily, the couch is wedged
against a wall, so you push hard and
manage to bounce onto the floor.
But now you have another problem
because you are sliding toward the
door and you cant stop! You slip
out the door, down the stairs, and
down the street.
What is friction?
Where do you encounter
friction?
How can
we increase or
decrease friction?
I
magine sitting on a couch at
home. You decide to stand up,
but when you try to push off the
ground, your feet slip out from
under you. Everything is as slippery
as ice. Luckily, the couch is wedged
against a wall, so you push hard and
manage to bounce onto the floor.
But now you have another problem
because you are sliding toward the
door and you cant stop! You slip
out the door, down the stairs, and
down the street.
Could Life Survive?
A world without friction would be very different from
the one we know. Many people wonder if life would
even be possible. Could animals breathe without
friction? Could cells interact? Would blood pump?
How would living things get the food and nutrients
they need? As you read about friction,
think about how it affects life on Earth.
A gem cannot be polished without
friction, nor a man perfected without trials.
Lucius Annaeus Seneca, philosopher
In a world without friction, every
living thing around you is having the same
problem. Plants lie limply on the ground,
their roots unable to hold them in the
dirt. Cars, trucks, and trains are unable to
move. Crawling critters cant crawl, and
nothing can run or walk. A few creatures
may have figured out how to bounce off
things, but the only way to stop would
be to crash into something else or grab