Darlene R Stille

Offers an introduction to the principles of motion, describing inertia, gravity, and friction.

Describes what energy is, where it can be found, and how it is used in everyday life.

Discusses what air is, how we use it, the relationship of air and weather, and the importance of clean air.

Discusses how planes fly, their parts, and their different uses.

Presents a general description of deserts and describes specific desert plants, animals, people, and activities.

Describes the Earth's soil and mankind's uses of soil, covering the importance of soil, types of soil, and how we can protect soil from pollution.

The devastating effects of earthquakes have been seen throughout history, and the damage of these ground trembling natural disasters still creates havoc today. Scientists are developing new instruments to detect earthquakes before they happen. And since earthquakes cannot be prevented, they are also developing new methods to prepare for the extreme shaking. These advancements, along with advance warning systems, are the future of seismology and could...