Jennings, Terry J

Presents simple experiments and activities to demonstrate why some objects bounce and roll and others do not, why some balls bounce higher than others, how to measure balls, and how hard a rolling ball can push.

Explains how and why tornadoes and hurricanes occur and discusses what can be done to prevent them or lessen their effects.

Photographs and text provide information about how and why floods and tidal waves occur, and discuss what can be done to prevent them, or lessen their effects.

Explains how and why avalanches and landslides occur and discusses what can be done to prevent them or lessen their effects.

Describes different objects used for measuring time and how they work. Includes activities and experiments.

Provides a brief introduction to mountains, discussing how they are created, why they are constantly changing, and how they provide a home to plants, animals, and humans.

Experiments and activities explain what primary colors are, why a rainbow is many different colors, and how animals use color.

Presents experiments and activities relating to the measurement of time, such as making a sundial, water clock, and candle clock.

Explores light and optics, covering such topics as refraction, lenses, and lasers, with related activities such as making a pinhole camera.

An introduction to the uses of weights and measurements, how standard measurements have developed, and to the instruments used to measure and weigh. Includes simple activities.