Photo Acknowledgments
The images in this book are used with the permission of: Design element (pencil) © primiaou/
Shutterstock Images, pp. 8, 10, 12, 14, 16, 21, 22, 29; © Visual Generation/Shutterstock Images,
pp. 1 (clock), 30 (clock); © mhatzapa/Shutterstock Images, pp. 1 (balloon, CD), 15 (balloon, CD),
24 (ball), 26 (balloons), 28 (balloons); © Mighty Media, Inc., pp. 1 (hoopster), 7 (ruler, orange duct
tape, utility knife, battery, scissors, stopwatch), 8–29 (project photos), 12 (hoopster), 13 (hoopster),
16 (cotton balls), 17 (cotton balls); © Sudowoodo/Shutterstock Images, pp. 1 (sun), 18 (sun);
© VectorShow/Shutterstock Images, pp. 1 (water bottle), 3 (water bottle), 9 (water bottles),
28 (water bottle); © puruan/Shutterstock Images, pp. 3 (stethoscope), 10 (stethoscope); © Julia
Kuznetsova/Shutterstock Images, p. 4 (hand with bottle caps); © Rawpixel.com/Shutterstock Images,
p. 5 (children with recycle bin); © Rawpixel/iStockphoto, p. 6 (child with balloon); © serkan senturk/
Shutterstock Images, p. 7 (hot glue guns); © halimqd/Shutterstock Images, p. 19 (pizza box); © Tiwat
K/Shutterstock Images, p. 31 (computer)
Front cover: © STILLFX/Shutterstock Images (background); © Sudowoodo/Shutterstock Images
(sun); © VectorShow/Shutterstock Images (garbage can, recycle symbol); © Visual Generation/
Shutterstock Images (clock); © yoyoyai/Shutterstock Images (cola bottle)
Back cover: © mhatzapa/Shutterstock Images (leaf); © primiaou/Shutterstock Images (pencil);
© Sashatigar/Shutterstock Images (lightning bolt); © STILLFX/Shutterstock Images (background);
© VectorShow/Shutterstock Images (box, water bottle)
Index
air, 8
,
14–16
,
22
,
25–
26
,
cleanup, 6
,
30
kinetic energy, 16
,
22
,
29
materials, 4
,
6–8
,
10
,
12
,
14
,
16
,
18
,
22
,
26
,
3
natural resources, 4
potential energy, 16
,
22
,
29
recycled materials, 4
,
6
,
10
,
30
safety, 15
,
30
satety, 10
solar, 18
,
21
s
–9
,
10
storage, 30
workspace, 6
,
30
32
