Much of what we know today about Earth is from images taken by cameras on powerful telescopes. Edwin Hubble changed our view of the universe. Working in an observatory, he found that there are other galaxies besides the Milky Way. He also showed that the universe is still growing. Lyman Spitzer, Jr. proposed placing telescopes in space, and in 1990, the Hubble Space Telescope was launched. It sends us amazing images of the universe.
Take a closer look at the automobile by exploring Henry Ford's assembly-line production, auto safety, hazards of smog and pollution as well as potential cars of the future. This book includes vocabulary related to auto parts and auto function.
Come and get it! This book compares the different ways food is grown, harvested, and stored throughout history as well as the properties of growing and selling food. Take this mouth-watering journey packed with vocabulary related to food preparation and distribution.
All aboard! It's time to learn about trains from their humble beginning of the steam engine and chugs to the diesel-electric trains of today including the unique construction of the tracks and wheels, as well as the multitude of jobs that exists in the world of locomotives.
Follow a day in the life of cowboys and cowgirls as they carry out their everyday duties caring for and herding cattle. This book reveals the history of cowhands and how the job has changed over time. Readers will make a language arts connection while learning interesting vocabulary relating to cowhands and ranch life.
Discover developments in travel over the last 200 years including the advances of today's travel methods, which make it easier to visit different places in a shorter amount of time. Readers are exposed to vocabulary related to travel methods.