Did you know that both electricity and light move in waves, like water does? What does electricity have to do with magnets? From Benjamin Franklin and Charles de Coulomb to Georg Ohm and James Joule, readers will be introduced to the basic principles of light, electricity, and magnetism in an illuminating way.
"Prairie dogs, vultures, grasshoppers, goldfinches, pocket gophers, and bison are some of the many animals that make up a grassland food web. But do you know how the many types of grasses in a grassland benefit these animals? Or how earthworms and other decomposers play an important role in the food web?"--Back cover.
Seals, otters, oysters, fish, pelicans, and sharks are a few of the animals that make up an ocean food web. But did you know that almost all ocean creatures depend on algae to live? Or that bacteria, crabs, and lobsters break down dead plants and animals into nutrients? See ocean food webs in action in this fascinating book.
Frogs, minnows, snails, ducks, catfish, and muskrats are a few of the animals that make up a lake and pond food web. But do you know why mosquitoes, mold, water lilies, and bacteria are important too? Or how humans can change the health of a lake or a pond? See lake and pond food webs in action in this fascinating book.
Moose, lemmings, owls, wolves, bumblebees, and grizzly bears are some of the many animals that make up a tundra food web. But did you know that worms, beetles, mushrooms, and bacteria break down dead plants and animals into nutrients? Or that tundra animals depend on berries, seeds, and other plants to stay alive? See tundra food webs in action in this fascinating book.
Beetles, toads, squirrels, owls, deer, and black bears are some of the many animals that make up a forest food web. But did you know that leaves, berries, mushrooms, and tiny bacteria are also important? Or that humans can affect the health of a forest? See forest food webs in action in this fascinating book.
This book describes Venus, the second planet from the Sun. The text discusses Venus' distinguishing characteristics, its position in the solar system, its composition and atmospheric conditions, its moons and rings, and how scientists have learned about Venus over time.
Outraged people claimed that Darwin's theory had made humans the relatives of monkeys. Scientists were sure that species changed over time, but no one could explain how. In the 1800s, Charles Darwin's studies of thousands of specimens of living things showed that no two individuals of any species were exactly alike. He realized that over millions of years, some individuals had traits that gave them an edge to survive and reproduce. As they reproduced,...
Where did our universe come from? People have been trying to answer this question for thousands of years. The twentieth century brough new discoveries in physics and astronomy that led scientists to develop the Big Bang theory-a detailed idea that describes how our universe formed. According to this theory, the entire universe began in a single instant, in an unimaginably powerful explosion. That explosion created all time and space, all matter and...
What causes thunderstorms and lightning? Where and why do hurricanes form? How are blizzards more dangerous than other snowstorms? To answer these questions, you'll need to know about nature's most powerful weather events. Storms of all types and sizes occur around the globe. Each storm needs just the right combination of weather conditions to form and become dangerous-or even destructive. In this fact-packed book, discover how storms form, where...
How do scientists predict the weather? What tools and instruments help them make forecasts? How far in advance can they make good predictions? Weather forecasting is a tricky science. Forecasters gather current weather data and study trends and historical patterns. They use their expertise to predict what kind of weather is likely coming next-with help from computers, satellites, and other machines. In this fact-packed book, discover what it really...
How does a cloud form? When is the best time to see a rainbow in the sky? Why do ice cubes shrink in the freezer? The answers to these questions all involve water. So do the reasons why we have rain and snow. To understand weather, we have to know what happens to water at different temperatures, on the ground and in the air. In this fact-packed book, discover what happens when water changes from a liquid into a gas or a solid, and much more.
Why does the wind blow? What does air pressure have to do with a thunderstorm? Why is a mountaintop snowy while the valley below is warm? The answers to these questions all involve the layer of air surrounding Earth-the atmosphere. Earth's atmosphere is always in motion. It moves clouds, storms, and warm and cold air from one part of the planet to another. In this fact-packed book, discover how the ever-changing atmosphere determines weather around...
Do you know why a 10-ton boat floats but a tiny pebble sinks? Or why a hot air balloon will rise, but when you inflate a balloon it drops to the ground? From Archimedes and Boyle to Pascal and Charles, discover the basic principles of fluid mechanics in a refreshing and fun way.
Have you ever wondered why things drop to the ground instead of float or fly? Or how a heavy satellite can orbit Earth without crashing into it? From Copernicus and Kepler to Galileo and Newton, the scientific laws that show how and why things move are explored.
Have you ever seen a magician make something disappear and question if anything could really just vanish? Do you know why the periodic table is set up the way it is? From Lavoisier and Joule to Dalton and Mendeleyev, take a look at the basic principles of matter and thermodynamics in a fun and exciting way.
Do you ever wonder why it seems like you are not moving even though you are standing on a planet that moves through space? How does matter turn into energy? From Lavoisier to Einstein, Planck, and Bohr, the basic principles of modern physics are revealed in an exciting and appealing way.
Snakes, lizards, rabbits, mice, mountain lions, and hawks are some of the many animals that make up a desert food web. But do you know how desert animals depend on cactuses, grasses, and other plants to stay alive? Or why tiny insects, fungi, and bacteria may be among the most important living things in a desert? See desert food webs in action in this fascinating book.