Simple Machines
How can we lift and lower things? How can we move heavy loads from one place to another? By using simple machines! Wheels, wedges, levers, pulleys, screws, and inclined planes are the simple machines that help us do work. In this series, students will discover how to use them each day to make life easier. Additional features to aid comprehension include a table of contents, a phonetic glossary, informative sidebars, sources for further research, an index, and an introduction to the author.
Readers learn how this simple machine makes it easier to move things to different levels. They learn how flatter slopes use less effort than steeper slopes. By the end of the book, readers… More →
- Reading Level Grade 1
- Lexile 600
- Copyright 2013
- Dimensions 9.5 x 8
Readers learn how this simple machine makes it easier to lift, lower, and open things. They learn the three types of levers: first-class, second-class, and third-class. By the end of the… More →
- Reading Level Grade 1
- Lexile 630
- Copyright 2013
- Dimensions 9.5 x 8
Readers learn how this simple machine makes it easier to lift and lower objects. They learn about fixed and movable pulleys and when it is best to use each. By the end of the book, readers… More →
- Reading Level Grade 1
- Lexile 730
- Copyright 2013
- Dimensions 9.5 x 8
Readers learn how this simple machine makes it easier to keep objects locked together. By the end of the book, readers know the difference between complex and simple machines and how screws… More →
- Reading Level Grade 1
- Lexile 580
- Copyright 2013
- Dimensions 9.5 x 8
Readers learn how this simple machine makes it easier to split things apart or stop them from moving. They learn how thicker wedges need more force to split something apart than thinner… More →
- Reading Level Grade 1
- Lexile 700
- Copyright 2013
- Dimensions 9.5 x 8
Readers learn how this simple machine makes it easier to move things from one place to another. They also learn a wheel works with an axle. By the end of the book, readers know the difference More →
- Reading Level Grade 1
- Lexile 600
- Copyright 2013
- Dimensions 9.5 x 8