Paul Fleisher

"Have you ever wondered why a 10-ton boat floats but a tiny pebble sinks? Archimedes knew why. How does a basketball or tennis ball bounce? Robert Boyle could have described how! Can you explain why a hot-air balloon rises but a balloon you blow up drops to the ground? To answer these questions and many more, author Paul Fleisher explains the laws that define how and why liquids and gases behave the way they do. Through simple experiments, detailed...

Presents illustrated descriptions of matter and energy, explaining the law of conservation of matter, the law of definite proportions and Gay-Lussac's Law, Meneleyev's periodic law, and the first and second laws of thermodynamics, and providing a time line with biographical sketches of scientists.

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.

"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.

Learn about Darwin's revolutionary theory.

Learn basic facts about the planet Venus and its place in the solar system.

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...

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...

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.

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.