Sloping Up and Down explores the benefits and uses of the ramp. RobbO and RobbEE learn that a ramp is called an inclined plane. They discover that ramps are used for building stairs and escalators, and were even used as far back as ancient Egypt to build the pyramids.
| ISBN: | 9780778704256 |
| Publication date: | 28th February 2014 |
| Author: | Gerry Bailey |
| Publisher: | Crabtree Classics an imprint of Crabtree Publishing Company |
| Format: | Paperback |
| Pagination: | 32 pages |
| Series: | Robotx Get Help from Simple Machines |