Books in Reading Essentials in Science. Human Body Basics series

Watersheds are areas of land from which all of the water drains into the same body of water. These watersheds are separated by divides.

What can you mix together, take apart, and then put back together again? Mixtures and solutions are versatile combinations of substances that aren't chemically bonded.

With an estimated 13 to 14 million different plants and animals on Earth, a classification system is critical to the scientific study and appreciation of the plant and animal world.

The weather is responsible for many natural disasters. Explore thunderstorms, tornadoes, hurricanes, floods, drought, blizzards, and avalanches and their disastrous effects.

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George Washington led a group of courageous male and female spies during the American Revolution.

Take a closer look at the microscopic world of cells, the basic building blocks of all life.

Inhale information about the system that brings essential oxygen into the body and carries harmful substances away to ensure a lifetime of healthy breathing.

Travel the alimentary canal to learn how food is digested with help from the liver, pancreas, and gallbladder. Find out how nutrition affects digestion and health.

Acids and bases are compounds with specific properties that are very important to everyday life

Using new technology, scientists are sending telescopes, observatories, and probes into space looking for places where life did, does, or could exist.

Learn how stars, like our Sun, are born and how scientists determine their magnitude and distance from Earth. Learn what happens when stars die and become novas, supernovas, white dwarfs, black dwarfs, or even black holes.