"Living and nonliving things live together, in an ecosystem. Each thing living in the ecosystem relies on something else. To stay alive, all living things in an ecosystem need to live in balance. Can you think of an ecosystem you have seen?"-- Provided by publisher.
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Introduces readers to English scientist Jane Goodall and her work with chimpanzees.
"A habitat is a living thing's home. A habitat gives shelter to plants and animals. It also helps them survive. There are many different types of habitats on Earth."-- Provided by publisher.
The water cycle is like a circle it has no beginning and no end. When the sun heats ocean water, it evaporates and forms clouds in the sky. When these particles get big enough, they can fall to Earth as precipitation in the form of rain, sleet, snow, or hail. When water hits the ...
Some of the first geologists came from ancient Greece and Egypt. Later, scientists in China studied how land was formed and figured out how erosion wears away mountains, rocks, and other landforms. Scottish scientist James Hutton's The Theory of the Earth became the basis for mod...
"The ground you're standing on, the air you breathe, and the clouds you gaze at. They are all part of your home. They are also nonliving things. Living things don't only rely on one another; they also need nonliving things to survive. Everything in an ecosystem plays an important...
There are many different kinds of rocks. But rocks have many things in common, too. All rocks are solid, are made naturally, and are made up of groups of smaller particles and minerals that are stuck together. There are three types of rocks: igneous, sedimentary, and metamorphic....
"All life is important in its own way. Each living thing contributes something to our world. Taking away just one creature can disrupt the delicate balance nature created. From sprouting plants to crawling insects to sneaky snakes to vicious cougars--all of these organisms are in...
Water science dates back to the tenth century when Persians made discoveries about groundwater. Mathematician Mohammed Karaji wrote an early book about the main ideas of the water cycle. In the 1500s, Bernard Palissy connected the flow of rivers and streams to rainfall. Astronome...
"In a doomsday scenario with resources disappearing, will you have what it takes to find water in order to survive? This text examines some of the biological effects when someone is deprived of water, methods to stay hydrated, and other basic survival skills."-- Provided by publi...
"Will you have what it takes to build shelter in order to protect yourself from extreme temperatures? Struggle for Survival: Shelter examines survival skills to prevent exposure when dealing with the harsh elements."-- Provided by publisher.
"From microscopic creatures living under your couch to gigantic elephants roaming Earth, life needs energy. Energy starts with the sun. Then, it moves from one animal in an ecosystem to the next animal. This energy powers all life."-- Provided by publisher.