Did you know that the Atlantic Ocean is home to the world's largest underwater mountain range? It is called the Mid-Atlantic Ridge. Find out more in Atlantic Ocean.
Introduces readers to light waves. Its vibrant, hands-on examples help explain what light waves are, how they work, and how they can be used for communication.
Introduces readers to sound waves. Its vibrant, hands-on examples help explain what sound waves are, how they work, and how they can be used for communication.
Learn about the history of self-driving cars and how this new technology could change the world. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.
Examines water and access to it, discussing consumption and scarcity. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.