Explains how genes and traits are passed from from mothers and fathers, describing dominant and recessive genes, how they determine unique characteristics, and sex-linked traits.
Presents an in depth look at all parts of a plant cell and how they function, including what the three types of tissue plant cells are made of: dermal, vascular, and ground.
Explains how a cell's organelles work together to allow living things to function, and identifies such specialized cells as blood cells, muscle cells, and skin cells.
Describes how humans have affected the content of Earth's atmosphere with such everyday activities as driving, heating buildings, and using aerosols, and explains how doing so affects the health of th
Discusses how meteor showers form, where they can be observed, and their history, and provides a calendar of when specific meteor showers can be observed during the year.
The Iroquois Confederacy served as model for the founding fathers who wrote the U.S. Constitution. The Iroquois today continue their proud tradition of representative democracy as they thrive in moder
Baseball is much more than game-winning hits, double plays, and grand slams. It's a spectacular spectacle where baseball, science, technology, engineering, arts, and mathematics happen to meet.
Presents the text of the Pledge of Allegiance and a translation of the text using everday language, and includes historical information about the pledge
"Most areas are prone to flooding now and then, and Johnstown, Pennsylvania, is no exception. But in May 1889, a dam burst following heavy rains, and the people of Johnstown were in the path of someth
Explains the principles of inventing and provides instructions for making a variety of moving contraptions, including a confetti cannon, a catapult, and a toy electric car.
Describes various educational and work opportunities in colonial America, including learning at home, the first schools, apprenticeship, and early colleges, and discusses the different opportunities f
From the French and Indian War and the ensuing taxes to the creation of the Constitution and the Bill of Rights, the Revolutionary War era was a rowdy, transformational period in United States history
Looks at the causes of the 1877 flight of the Nez Perce, including various treaties and the discovery of gold, and its effect on the tribe and on the United States.
Garbage looks disgusting and smells worse, but what happens to it after the garbage truck takes it away? Discover where our trash travels after we throw it away. From facts on landfills to information
