Showing results for "A - M" in Science & Technology

Gravity is the force on Earth that keeps things from floating into space. If we drop a dish, it will fall to the ground. If we jump into the air, we will come back down.

Animals have many traits that help them survive in the wild. Inspired by animals' incredible abilities, military forces have created many machines over the years to achieve success on the battlefield. From the first remote-controlled vehicles to the advanced machines of tomorrow, learn how military robots and drones often imitate the abilities of animals throughout nature. Then be sure to catch the other amazing titles in the Beasts and the Battlefield series.

In the wild, animals use teeth, claws, and other natural weapons to attack their prey. On the battlefield, soldiers need weapons to fight the enemy. Military forces have often looked to nature for inspiration to develop effective weapons and combat tactics. From the first feathered arrows to tomorrow's high-tech weaponry, learn how military technology often imitates the natural weapons of animals to help soldiers succeed in combat. Then be sure to catch the other amazing titles in the Beasts and the Battlefield series.

Rocky peaks rise above earth’s surface. Mountains come in all shapes and sizes. Listen to Mountains to learn how these landforms take shape.

This is a classic geography book for children by author and educator Virgil M. Hillyer.

Did you know if you break a bone, the bone can repair itself? You'll need to visit the doctor to have your broken bone set in a cast, while your body is hard at work repairing the injury! The moment you fall, blood from your injury sends signals to cells to start building new bone–the process of repairing is on its way! Do you know what your body makes to create new bone?

Have you ever had an electrical power outage at home? In 2003, the largest blackout in United States history left millions of people without power for days! Learn how power generation plants are connected to the power grid that distributes electricity to regions of the country and to homes. What causes power outages? How does losing power affect daily life? What can people do to conserve energy?

Do you know how the lightbulb was invented? In the 1800s, the first incandescent lightbulb was invented by Thomas Edison. Learn how Edison experimented with different materials, direct current, and by trial and error to design the first lightbulb. Which power company was created that funded the first electric lighting system to distribute light? The company still operates today, lighting and powering our world!

Here's how a few pioneers forged their own unique paths in the conservation movement.

It takes commitment to overcome interests that stand in the way of protecting the environment. Meet three people who weren't afraid to speak up to protect natural areas—and us.

You push your friend while they swing. You pull open a door. What happens when you push or pull an object? Let’s investigate pushing and pulling forces!

The massive grassy African savanna is filled with the hunting activity of predators and their prey. The stamina of the hyena allows the animal to hunt its prey until it is too tired to fight. The lion’s strength makes its attacks swift and severe. But which animal is the fiercest of the ecosystem? Compare and contrast each animal’s features and skills before you declare the winning predator.

The dark floor and muddy rivers of the rain forest are perfect for hunting, and the jaguar and crocodile both stalk their prey with ease. But which animal is the fiercest of the ecosystem? Does the jaguar's speed give it an edge? Or does the crocodile's strength make it superior? Compare and contrast each animal’s features and skills before you declare the winning predator.

The icy cold Arctic is home to both the powerful polar bear and intelligent orca, two mighty predators. But which animal is the fiercest of the ecosystem? Does the polar bear’s patience in stalking its prey and strength in attack put it on top? Or does the orca’s ability to work in a pod give it the edge?

Animals are living things. Rocks are nonliving. Why? Let’s investigate the differences between living and nonliving things!

Some animals live in water. Some animals live on land. The land that animals live on can be very different. What makes a place the right home for an animal? Let’s investigate habitats!

Animals are living things. They need certain things to grow and live. What are they? Let’s investigate what animals need to survive!

Bald eagles, bees, and bats all fly. But a bee is an insect. A bat is a mammal. And a bald eagle is a bird! Why are these animals sorted into different groups? Let’s investigate animal classification!

Dig in to the wondrous world of dirt! In this introduction to soil, young science and nature lovers will discover the components of dirt, how it’s made, and how to maintain healthy soil for the environment.

Next to a continent or in the middle of the ocean, all islands are surrounded by water. These landforms can be rock, sand, or even coral. Listen to Islands to learn about life on these isolated places.