About this item
Machines help make work easier, like when you need to lift something heavy or reach way up high. There are six simple machines: the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw. Can you adjust a seesaw to lift an elephant? What happens when you combine two or more simple machines? Read and find out!With colorful illustrations and engaging text, Simple Machines will delight young readers who love figuring out how things work. Featuring rich vocabulary bolded throughout the text, this book also includes a glossary and a find out more section with a lever experiment and web research prompts. Both the text and the artwork were vetted for accuracy by Dr. Babatunde A. Ogunnaike, dean of the College of Engineering at the University of Delaware.
About the Author
David J. (D.J.) Ward entered college to study radio and television but quickly found his true passion was science. He finished with a master's degree in geology. After working as a geologist for seven years, David became a high school science teacher and has been teaching ever since. The classes he teaches are physics, astronomy, geology, and earth & environmental science. David lives in Colorado with his wife and two boys. He like to play basketball, volleyball, and Ultimate, hike in the mountains, and play bass guitar.
