Stille, Darlene R

Learn about the air around you, and find out about oxygen, the atmosphere, gases, and pollution.

The states of matter (solids, liquids, and gases) are explained and demonstrated. Includes an experiment to try.

The forms of energy are discovered, including chemical energy, kinetic energy, and solar energy.

Discusses the importance the journals of Meriwether Lewis and William Clark were during their exploration of the West and how their writings were able to describe new plants and animals for scientists.

Presents an introduction to air, explaining its role in life on Earth, and discussing what is in air, how to feel air, and the importance of keeping air clean. Includes experiments and a glossary.

Provides an introduction to the geography, natural resources, history, government, economy, important sites, daily life, and people of Puerto Rico; and includes tips on visiting the commonwealth; related projects, a time line, a glossary, fast facts, a biographical dictionary, and resources.

Provides information about how and why things move, and includes fun facts, a related experiment, and a glossary.

Provides information about temperature, explaining how it is measured, where heat comes from, how things get hot or cold, and how to stay warm. Includes an activity and glossary.

Provides an introduction to freight trains, discussing the purpose of different types of train cars, looking at the train track and wheels, and including a glossary and list of resources.

Photographs and simple text describe what it is like to drive large trucks and semis.