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2327 records found. Displaying 2281 - 2304.
Grasslands & Deserts
From the Series Vanishing from
How are Utah prairie dogs, Asiatic lions, Galapagos tortises, and West African ostriches all alike? Over-hunting and changes to their habitats have pushed them, and many more animals, almost… Read More →
Inclined Planes and Wedges
From the Series Early Bird Physics
What is an inclined plane? How do you use a wedge? Using easy-to-understand examples and fun-to-do experiments, discover how these two simple machines work and make the work that you do easier. Read More →
Liquids and Gases: Principles of Fluid Mechanics
From the Series Secrets of the Universe
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… Read More →
Matter and Energy: Principles of Matter and Thermodynamics
From the Series Secrets of the Universe
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… Read More →
Objects in Motion: Principles of Classical Mechanics
From the Series Secrets of the Universe
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… Read More →
Pulleys
From the Series Early Bird Physics
How does a pulley work? What is it? Colorful diagrams and fun-to-do experiments help you explore the many ways this simple machine can help make work easier and faster. Read More →
Relativity and Quantum Mechanics: Principles of Modern Physics
From the Series Secrets of the Universe
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… Read More →
Screws
From the Series Early Bird Physics
We've all seen screws, but how do they work? Why is it easier to screw something into something than to simply push it in? With basic hands-on experiments and clear descriptions, this simple… Read More →
Spring
From the Series First Step Nonfiction — Seasons
A basic overview of the spring season. Color photographs reflect the short, easy-to-understand sentences that improve vocabulary and comprehension. Read More →
Summer
From the Series First Step Nonfiction — Seasons
A basic overview of the summer season. Color photographs reflect the short, easy-to-understand sentences that improve vocabulary and comprehension. Read More →
The Skies
From the Series Vanishing from
What do masked bobwhites, Hawaiian hawks, harpy eagles, and Kitti's hog-nosed bats have in common? They, along with many other birds, are endangered species. They are close to becoming… Read More →
Waterways
From the Series Vanishing from
Chinese egrets, humpback whales, Chinook salmon, and manatees might seem to have little in common, but they do--they are all close to extinction. They, and several other animals, have… Read More →
Waves: Principles of Light, Electricity, and Magnetism
From the Series Secrets of the Universe
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… Read More →
Wheels and Axles
From the Series Early Bird Physics
Of the six simple machines, the wheel and axle is probably the most recognized. But how does it help you work? Simple and fun experiments illustrate the basic concepts explained in the text… Read More →
Work
From the Series Early Bird Physics
What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these… Read More →
A Walk in the Boreal Forest
From the Series Biomes of North America
Take a walk in the boreal forest. This biome of tall conifer trees and shaded, cool paths has long winters and very short summers. How do the plants and animals of the boreal forest live?… Read More →
A Walk in the Deciduous Forest
From the Series Biomes of North America
Take a walk in the deciduous forest. In this biome of leafy trees and fast changing weather, there are four very different seasons. As you walk through this incredible biome, discover how all… Read More →
A Walk in the Rain Forest
From the Series Biomes of North America
Take a walk in the rain forest. This hot and humid biome is home to countless trees, animals, plants, and insects. Each and every insect, plant, and animal of the rain forest is dependent on… Read More →
A Walk in the Tundra
From the Series Biomes of North America
Take a walk on the tundra. In this cold, harsh biome on the top of the world, summer is short. How do plants and animals of the tundra live? Discover how they depend on each other for… Read More →
Biomes of North America — Paperback Set
From the Series Biomes of North America
Set
Kids can grab their notebooks and take a virtual tour through each biome, exploring the life cycles of plants and animals through this highly visual, unique series. Read More →
Floating Jellyfish
From the Series Pull Ahead Books — Animals
Have you ever avoided stepping on a jellyfish so that it wouldn't sting you? Uncover why jellyfish sting, how they clone themselves and glow in the dark, and how they hide from predators… Read More →
Levers
From the Series Early Bird Physics
Do you know what a lever is? How can a lever help you? Through simple experiments and clear explanations, understand how this simple machine functions and how it can make the work that you do easier. Read More →
Soaring Bald Eagles
From the Series Pull Ahead Books — Animals
Did you kow that bald eagles are not really bald? They have bright white feathers that cover their heads. From down-covered eaglet to flying eagle, get to know this majestic bird as it soars… Read More →
A Walk in the Desert
From the Series Biomes of North America
Take a walk through the desert. This hot, dry biome of the southwest is full of life. How do plants and animals of the desert live? As you wander through the desert, discover how each and… Read More →