Educational: Mathematics, science and technology, general

People, animals, machines, and wind all make sounds.

Solids, liquids, and gases are the three states of matter.

You know that magnets hold pictures on a refrigerator.

The sun, lightbulbs, and flickering fires all bring light to our world.

The sun, furnaces, and ovens all make heat.

Electricity powers lights, computers, and television sets.

Many people store food in refrigerators and clean clothes in washing machines.

Many people use cell phones and e-mail to communicate with others.

All kinds of animals have skin-even humans!

What animals have shells?

Some mammals have a little fur or hair, others have a lot!

See how birds use feathers for flight, warmth, camouflage, and much more.

The oil spill was the largest in U.

Have you ever wondered how stars are born?

Uncover seven wonders of the four rocky planets.

The universe is full of space phenomena, such as dark matter, dark energy, and the beginning of the universe.

From earliest times, humans have wondered about the sky above them.

From earliest times, humans have looked to the sky in wonder, and their wonder and curiosity fueled science.

From earliest times, humans have wondered about the sky above them and have studied all visible objects.

From earliest times, humans have wondered about the sky above them.

Congratulations, insect parents-to-be!

Diamonds, cubes, rings, and cylinders-shapes are all around us.

A pot of water boils over a hot burner on the stove.

Light shines through your kitchen window.

Ice cubes clink in a glass.

Fireworks crackle and boom in the sky.

A light beach ball floats on the water.

Lightning streaks across the sky.

"e;No picture accurately resembled him in the minute traits of his person .

In North America, mosquito bites are usually only a nuisance.

In this playful look at patterns, Brian P.

How do scientists predict the weather?

An airplane soars through the sky.

A baseball player slides on the ground to tag a base.

A ball drops to the ground.

You push a swing.

A rock sinks in the water.

Every month a cycle happens in the sky.

Day follows night.

Studying Antarctica has never been for the fainthearted.

This book examines the history of human energy use as well as the latest energy developments in the United States.

In every age, science and technology have advanced human civilization.

In every age, science and technology have advanced human civilization.

In every age, science and technology have played an important role in advancing human civilization.

What is that garbage doing next to the garden?

Everyone dies .

There is no gravity in space.

It takes seven years to digest swallowed gum.

This lively and informative book introduces beginning readers to the Sun, which is the center of our solar system and the system's largest object.

This lively and informative book introduces beginning readers to the planets, dwarf planets, asteroids, and comets that make up our solar system; the Sun as the center of the solar system; and more.