Amy Hayes 
Why Do Cars Need Gas? [PDF ebook] 
And Other FAQs About Machines

So much of our days are spent inside cars-but do most people know how they work? After finishing this book, readers will know all about how cars use their fuel and move and much more about other machines! Including descriptions of simple physical science concepts and how some machines were invented, the main content is laid out in a fun, interactive way with lots of fact boxes and diagrams to aid readers’ understanding. Full-color photographs complement each spread, highlighting the information presented.